Natural Product: NPC191565

Natural Product ID:  NPC191565
Common Name:   Gibberoketosterol B
IUPAC Name:   (1S,3S,5S,8S,9S,10S,13R,14S,17R)-1,3,5-trihydroxy-10,13-dimethyl-17-[(E,2R)-6-methyl-5-methylidenehept-3-en-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-6-one
Synonyms:   gibberoketosterol B
Molecular Formula:   C28H44O4
Standard InCHIKey:  GGUKDEVDQIQJKX-FBLPJEGZSA-N
Standard InCHI:  InChI=1S/C28H44O4/c1-16(2)17(3)7-8-18(4)21-9-10-22-20-14-25(31)28(32)15-19(29)13-24(30)27(28,6)23(20)11-12-26(21,22)5/h7-8,16,18-24,29-30,32H,3,9-15H2,1-2,4-6H3/b8-7+/t18-,19+,20+,21-,22+,23+,24+,26-,27+,28-/m1/s1
Canonical SMILES:  O[C@H]1C[C@H](O)[C@]2([C@](C1)(O)C(=O)C[C@@H]1[C@@H]2CC[C@]2([C@H]1CC[C@@H]2[C@@H](/C=C/C(=C)C(C)C)C)C)C
First Find Year:  
Max Developmental Stage:  
Synthetic Gene Cluster:   ;

  Species Source

Organism ID Organism Name Taxonomy Level Family SuperKingdom Isolation Part Collection Location Collection Time Reference
NPO25026 Sinularia gibberosa Species Alcyoniidae Eukaryota PMID[16989519]

  Biological Activity

Target ID Target Type Target Name Target Organism Activity Type Activity Relation Value Unit Reference
NPT82 Cell Line MDA-MB-231 Homo sapiens IC50 > 30 ug/ml 9051909
NPT2 Others Unspecified IC50 > 30 ug/ml 9051909
NPT81 Cell Line A549 Homo sapiens IC50 > 30 ug/ml 1965654
NPT83 Cell Line MCF7 Homo sapiens IC50 > 30 ug/ml 1965654

  Similar Natural Products in NPASS

Similarity level is defined by Tanimoto coefficient (Tc) between two molecules. Tc lies between [0, 1] where '1' indicates the highest similarity. What is Tanimoto coefficient

●  The left chart: Distribution of similarity level between NPC191565 and all remaining natural products in the NPASS database.
●  The right table: Most similar natural products (Tc>=0.56 or Top200).

Similarity Score Similarity Level Natural Product ID
0.956 High Similarity NPC209662
0.9231 High Similarity NPC46758
0.9167 High Similarity NPC477051
0.9167 High Similarity NPC477053
0.9167 High Similarity NPC477052
0.9072 High Similarity NPC477054
0.9011 High Similarity NPC193360
0.898 High Similarity NPC247957
0.898 High Similarity NPC249187
0.88 High Similarity NPC257353
0.875 High Similarity NPC49371
0.8737 High Similarity NPC245972
0.8737 High Similarity NPC196485
0.871 High Similarity NPC474245
0.87 High Similarity NPC72255
0.8602 High Similarity NPC292491
0.8602 High Similarity NPC310752
0.86 High Similarity NPC191892
0.8571 High Similarity NPC119036
0.8571 High Similarity NPC103051
0.8526 High Similarity NPC473167
0.8495 Intermediate Similarity NPC141292
0.8485 Intermediate Similarity NPC15390
0.8454 Intermediate Similarity NPC127063
0.8454 Intermediate Similarity NPC271195
0.8454 Intermediate Similarity NPC279974
0.8454 Intermediate Similarity NPC180950
0.8454 Intermediate Similarity NPC272617
0.8438 Intermediate Similarity NPC12722
0.8431 Intermediate Similarity NPC166607
0.8426 Intermediate Similarity NPC146786
0.84 Intermediate Similarity NPC118964
0.8387 Intermediate Similarity NPC51014
0.8351 Intermediate Similarity NPC474690
0.8351 Intermediate Similarity NPC49670
0.8351 Intermediate Similarity NPC111015
0.8351 Intermediate Similarity NPC299100
0.835 Intermediate Similarity NPC165873
0.8333 Intermediate Similarity NPC29705
0.8333 Intermediate Similarity NPC185936
0.8333 Intermediate Similarity NPC272746
0.8333 Intermediate Similarity NPC160843
0.8333 Intermediate Similarity NPC168027
0.8316 Intermediate Similarity NPC1015
0.8316 Intermediate Similarity NPC475921
0.8316 Intermediate Similarity NPC474704
0.8316 Intermediate Similarity NPC76879
0.8316 Intermediate Similarity NPC32830
0.8316 Intermediate Similarity NPC31985
0.83 Intermediate Similarity NPC144956
0.83 Intermediate Similarity NPC154072
0.8298 Intermediate Similarity NPC90652
0.8283 Intermediate Similarity NPC474785
0.8283 Intermediate Similarity NPC18509
0.8283 Intermediate Similarity NPC474938
0.8283 Intermediate Similarity NPC108078
0.8283 Intermediate Similarity NPC190554
0.8265 Intermediate Similarity NPC280725
0.8265 Intermediate Similarity NPC88310
0.8265 Intermediate Similarity NPC472485
0.8235 Intermediate Similarity NPC222153
0.8235 Intermediate Similarity NPC312900
0.8235 Intermediate Similarity NPC117185
0.8229 Intermediate Similarity NPC126993
0.8211 Intermediate Similarity NPC44181
0.8211 Intermediate Similarity NPC470417
0.8208 Intermediate Similarity NPC207689
0.8191 Intermediate Similarity NPC6605
0.8191 Intermediate Similarity NPC473168
0.8191 Intermediate Similarity NPC201273
0.8182 Intermediate Similarity NPC471153
0.8182 Intermediate Similarity NPC192428
0.8173 Intermediate Similarity NPC477916
0.8172 Intermediate Similarity NPC474233
0.8172 Intermediate Similarity NPC59453
0.8172 Intermediate Similarity NPC474493
0.8172 Intermediate Similarity NPC474482
0.8172 Intermediate Similarity NPC475745
0.8172 Intermediate Similarity NPC221758
0.8163 Intermediate Similarity NPC8993
0.8163 Intermediate Similarity NPC103527
0.8163 Intermediate Similarity NPC292793
0.8155 Intermediate Similarity NPC201763
0.8152 Intermediate Similarity NPC48362
0.8144 Intermediate Similarity NPC86266
0.8144 Intermediate Similarity NPC131872
0.8144 Intermediate Similarity NPC212301
0.8144 Intermediate Similarity NPC110657
0.8144 Intermediate Similarity NPC475806
0.8137 Intermediate Similarity NPC271980
0.8137 Intermediate Similarity NPC193934
0.8125 Intermediate Similarity NPC122116
0.8125 Intermediate Similarity NPC77168
0.8125 Intermediate Similarity NPC326627
0.8125 Intermediate Similarity NPC310010
0.8125 Intermediate Similarity NPC186688
0.8125 Intermediate Similarity NPC84271
0.8125 Intermediate Similarity NPC102414
0.8119 Intermediate Similarity NPC474720
0.8119 Intermediate Similarity NPC83709
0.8105 Intermediate Similarity NPC142361
0.8105 Intermediate Similarity NPC241875
0.8105 Intermediate Similarity NPC475740
0.8105 Intermediate Similarity NPC469314
0.8105 Intermediate Similarity NPC136548
0.8105 Intermediate Similarity NPC153604
0.8105 Intermediate Similarity NPC58063
0.8105 Intermediate Similarity NPC469317
0.8105 Intermediate Similarity NPC474684
0.81 Intermediate Similarity NPC170978
0.8085 Intermediate Similarity NPC474218
0.8085 Intermediate Similarity NPC470574
0.8081 Intermediate Similarity NPC222845
0.8081 Intermediate Similarity NPC476245
0.8081 Intermediate Similarity NPC162001
0.8081 Intermediate Similarity NPC45324
0.8077 Intermediate Similarity NPC196528
0.8065 Intermediate Similarity NPC475726
0.8065 Intermediate Similarity NPC113978
0.8065 Intermediate Similarity NPC472743
0.8061 Intermediate Similarity NPC224060
0.8061 Intermediate Similarity NPC107674
0.8061 Intermediate Similarity NPC170220
0.8061 Intermediate Similarity NPC475255
0.8061 Intermediate Similarity NPC141497
0.8061 Intermediate Similarity NPC233118
0.8061 Intermediate Similarity NPC470375
0.8061 Intermediate Similarity NPC244356
0.8061 Intermediate Similarity NPC470376
0.8061 Intermediate Similarity NPC134826
0.8058 Intermediate Similarity NPC311612
0.8056 Intermediate Similarity NPC108721
0.8056 Intermediate Similarity NPC73300
0.8041 Intermediate Similarity NPC470378
0.8041 Intermediate Similarity NPC149761
0.8041 Intermediate Similarity NPC136801
0.8041 Intermediate Similarity NPC129913
0.8041 Intermediate Similarity NPC320026
0.8041 Intermediate Similarity NPC85173
0.8041 Intermediate Similarity NPC261994
0.8041 Intermediate Similarity NPC171441
0.8039 Intermediate Similarity NPC282524
0.8039 Intermediate Similarity NPC476897
0.8022 Intermediate Similarity NPC215843
0.8021 Intermediate Similarity NPC474719
0.8021 Intermediate Similarity NPC471722
0.8021 Intermediate Similarity NPC474677
0.8021 Intermediate Similarity NPC328539
0.802 Intermediate Similarity NPC186810
0.802 Intermediate Similarity NPC114274
0.802 Intermediate Similarity NPC477854
0.8019 Intermediate Similarity NPC214644
0.8 Intermediate Similarity NPC74363
0.8 Intermediate Similarity NPC474732
0.8 Intermediate Similarity NPC472738
0.8 Intermediate Similarity NPC157113
0.8 Intermediate Similarity NPC94666
0.8 Intermediate Similarity NPC160056
0.8 Intermediate Similarity NPC131665
0.8 Intermediate Similarity NPC474778
0.8 Intermediate Similarity NPC475862
0.8 Intermediate Similarity NPC64844
0.8 Intermediate Similarity NPC89077
0.8 Intermediate Similarity NPC250757
0.8 Intermediate Similarity NPC42847
0.8 Intermediate Similarity NPC83744
0.8 Intermediate Similarity NPC185
0.8 Intermediate Similarity NPC20688
0.8 Intermediate Similarity NPC477853
0.8 Intermediate Similarity NPC263729
0.8 Intermediate Similarity NPC255387
0.8 Intermediate Similarity NPC31564
0.8 Intermediate Similarity NPC249954
0.8 Intermediate Similarity NPC62516
0.8 Intermediate Similarity NPC72133
0.8 Intermediate Similarity NPC474733
0.8 Intermediate Similarity NPC301534
0.8 Intermediate Similarity NPC213412
0.8 Intermediate Similarity NPC94755
0.8 Intermediate Similarity NPC78473
0.8 Intermediate Similarity NPC145879
0.7981 Intermediate Similarity NPC471293
0.7981 Intermediate Similarity NPC209502
0.7981 Intermediate Similarity NPC204833
0.7981 Intermediate Similarity NPC137657
0.798 Intermediate Similarity NPC159365
0.798 Intermediate Similarity NPC104371
0.798 Intermediate Similarity NPC111524
0.798 Intermediate Similarity NPC91772
0.798 Intermediate Similarity NPC469406
0.798 Intermediate Similarity NPC473172
0.798 Intermediate Similarity NPC153775
0.798 Intermediate Similarity NPC29247
0.798 Intermediate Similarity NPC80365
0.798 Intermediate Similarity NPC261333
0.798 Intermediate Similarity NPC289539
0.798 Intermediate Similarity NPC129004
0.798 Intermediate Similarity NPC101233
0.798 Intermediate Similarity NPC215271
0.798 Intermediate Similarity NPC471207

  Similar Clinical/Approved Drugs

Similarity level is defined by Tanimoto coefficient (Tc) between two molecules.

●  The left chart: Distribution of similarity level between NPC191565 and all drugs/candidates.
●  The right table: Most similar clinical/approved drugs (Tc>=0.56 or Top200).

Similarity Score Similarity Level Drug ID Developmental Stage
0.83 Intermediate Similarity NPD5286 Approved
0.83 Intermediate Similarity NPD4696 Approved
0.83 Intermediate Similarity NPD5285 Approved
0.8283 Intermediate Similarity NPD4755 Approved
0.8191 Intermediate Similarity NPD3618 Phase 1
0.8182 Intermediate Similarity NPD5221 Approved
0.8182 Intermediate Similarity NPD4697 Phase 3
0.8182 Intermediate Similarity NPD5220 Clinical (unspecified phase)
0.8182 Intermediate Similarity NPD5222 Approved
0.8172 Intermediate Similarity NPD4786 Approved
0.8144 Intermediate Similarity NPD6079 Approved
0.8137 Intermediate Similarity NPD5211 Phase 2
0.8137 Intermediate Similarity NPD5225 Approved
0.8137 Intermediate Similarity NPD5224 Approved
0.8137 Intermediate Similarity NPD5226 Approved
0.8137 Intermediate Similarity NPD4633 Approved
0.8125 Intermediate Similarity NPD5328 Approved
0.8125 Intermediate Similarity NPD4753 Phase 2
0.8119 Intermediate Similarity NPD4700 Approved
0.81 Intermediate Similarity NPD5173 Approved
0.8081 Intermediate Similarity NPD5210 Approved
0.8081 Intermediate Similarity NPD4629 Approved
0.8058 Intermediate Similarity NPD5175 Approved
0.8058 Intermediate Similarity NPD5174 Approved
0.8039 Intermediate Similarity NPD5223 Approved
0.8 Intermediate Similarity NPD5279 Phase 3
0.7981 Intermediate Similarity NPD5141 Approved
0.7957 Intermediate Similarity NPD3667 Approved
0.7944 Intermediate Similarity NPD4634 Approved
0.7935 Intermediate Similarity NPD7525 Registered
0.7925 Intermediate Similarity NPD6899 Approved
0.7925 Intermediate Similarity NPD6881 Approved
0.7905 Intermediate Similarity NPD5739 Approved
0.7905 Intermediate Similarity NPD6675 Approved
0.7905 Intermediate Similarity NPD6402 Approved
0.7905 Intermediate Similarity NPD7128 Approved
0.7879 Intermediate Similarity NPD4202 Approved
0.787 Intermediate Similarity NPD6650 Approved
0.787 Intermediate Similarity NPD6649 Approved
0.785 Intermediate Similarity NPD6373 Approved
0.785 Intermediate Similarity NPD6372 Approved
0.783 Intermediate Similarity NPD5697 Approved
0.7778 Intermediate Similarity NPD7102 Approved
0.7778 Intermediate Similarity NPD6883 Approved
0.7778 Intermediate Similarity NPD7290 Approved
0.7757 Intermediate Similarity NPD4730 Approved
0.7757 Intermediate Similarity NPD4729 Approved
0.7757 Intermediate Similarity NPD7320 Approved
0.7745 Intermediate Similarity NPD6084 Phase 2
0.7745 Intermediate Similarity NPD6083 Phase 2
0.7736 Intermediate Similarity NPD4768 Approved
0.7736 Intermediate Similarity NPD4767 Approved
0.7714 Intermediate Similarity NPD4754 Approved
0.7708 Intermediate Similarity NPD7520 Clinical (unspecified phase)
0.7708 Intermediate Similarity NPD5329 Approved
0.7706 Intermediate Similarity NPD8130 Phase 1
0.7706 Intermediate Similarity NPD6617 Approved
0.7706 Intermediate Similarity NPD6847 Approved
0.7706 Intermediate Similarity NPD6869 Approved
0.77 Intermediate Similarity NPD6399 Phase 3
0.7685 Intermediate Similarity NPD6014 Approved
0.7685 Intermediate Similarity NPD6012 Approved
0.7685 Intermediate Similarity NPD6013 Approved
0.7664 Intermediate Similarity NPD5701 Approved
0.7636 Intermediate Similarity NPD6882 Approved
0.7636 Intermediate Similarity NPD8297 Approved
0.7629 Intermediate Similarity NPD4694 Approved
0.7629 Intermediate Similarity NPD5280 Approved
0.7615 Intermediate Similarity NPD5247 Approved
0.7615 Intermediate Similarity NPD5248 Approved
0.7615 Intermediate Similarity NPD5251 Approved
0.7615 Intermediate Similarity NPD5250 Approved
0.7615 Intermediate Similarity NPD5249 Phase 3
0.7609 Intermediate Similarity NPD6932 Approved
0.7604 Intermediate Similarity NPD3665 Phase 1
0.7604 Intermediate Similarity NPD3666 Approved
0.7604 Intermediate Similarity NPD3133 Approved
0.7604 Intermediate Similarity NPD4197 Approved
0.76 Intermediate Similarity NPD7515 Phase 2
0.7593 Intermediate Similarity NPD5128 Approved
0.7593 Intermediate Similarity NPD6011 Approved
0.7568 Intermediate Similarity NPD4632 Approved
0.7553 Intermediate Similarity NPD6930 Phase 2
0.7553 Intermediate Similarity NPD6931 Approved
0.7545 Intermediate Similarity NPD5216 Approved
0.7545 Intermediate Similarity NPD5217 Approved
0.7545 Intermediate Similarity NPD5215 Approved
0.75 Intermediate Similarity NPD5696 Approved
0.75 Intermediate Similarity NPD6695 Phase 3
0.75 Intermediate Similarity NPD7638 Approved
0.75 Intermediate Similarity NPD4788 Approved
0.7478 Intermediate Similarity NPD6054 Approved
0.7455 Intermediate Similarity NPD5134 Clinical (unspecified phase)
0.7455 Intermediate Similarity NPD5169 Approved
0.7455 Intermediate Similarity NPD5135 Approved
0.7449 Intermediate Similarity NPD3574 Clinical (unspecified phase)
0.7449 Intermediate Similarity NPD5690 Phase 2
0.7447 Intermediate Similarity NPD6929 Approved
0.7431 Intermediate Similarity NPD5168 Approved
0.7429 Intermediate Similarity NPD7639 Approved
0.7429 Intermediate Similarity NPD7640 Approved
0.7426 Intermediate Similarity NPD8035 Phase 2
0.7426 Intermediate Similarity NPD5284 Approved
0.7426 Intermediate Similarity NPD5281 Approved
0.7426 Intermediate Similarity NPD8034 Phase 2
0.7423 Intermediate Similarity NPD7338 Clinical (unspecified phase)
0.7423 Intermediate Similarity NPD3668 Phase 3
0.7396 Intermediate Similarity NPD4223 Phase 3
0.7396 Intermediate Similarity NPD4221 Approved
0.7387 Intermediate Similarity NPD6401 Clinical (unspecified phase)
0.7387 Intermediate Similarity NPD5127 Approved
0.7379 Intermediate Similarity NPD5695 Phase 3
0.7368 Intermediate Similarity NPD6009 Approved
0.7368 Intermediate Similarity NPD7514 Phase 3
0.735 Intermediate Similarity NPD6370 Approved
0.734 Intermediate Similarity NPD6697 Approved
0.734 Intermediate Similarity NPD7145 Approved
0.734 Intermediate Similarity NPD6115 Approved
0.734 Intermediate Similarity NPD6114 Approved
0.734 Intermediate Similarity NPD6118 Approved
0.7328 Intermediate Similarity NPD6059 Approved
0.7328 Intermediate Similarity NPD6319 Approved
0.73 Intermediate Similarity NPD6672 Approved
0.73 Intermediate Similarity NPD5737 Approved
0.7283 Intermediate Similarity NPD6924 Approved
0.7283 Intermediate Similarity NPD6926 Approved
0.7282 Intermediate Similarity NPD7748 Approved
0.7265 Intermediate Similarity NPD6016 Approved
0.7265 Intermediate Similarity NPD6015 Approved
0.7263 Intermediate Similarity NPD6683 Phase 2
0.7255 Intermediate Similarity NPD7637 Suspended
0.7253 Intermediate Similarity NPD4808 Clinical (unspecified phase)
0.7253 Intermediate Similarity NPD4809 Clinical (unspecified phase)
0.7241 Intermediate Similarity NPD7100 Approved
0.7241 Intermediate Similarity NPD7101 Approved
0.7238 Intermediate Similarity NPD7902 Approved
0.7234 Intermediate Similarity NPD6925 Approved
0.7234 Intermediate Similarity NPD5776 Phase 2
0.7227 Intermediate Similarity NPD7492 Approved
0.7217 Intermediate Similarity NPD7115 Discovery
0.7204 Intermediate Similarity NPD3703 Phase 2
0.7204 Intermediate Similarity NPD7339 Approved
0.7204 Intermediate Similarity NPD6942 Approved
0.7203 Intermediate Similarity NPD5988 Approved
0.72 Intermediate Similarity NPD7750 Discontinued
0.72 Intermediate Similarity NPD7524 Approved
0.7193 Intermediate Similarity NPD5167 Approved
0.719 Intermediate Similarity NPD7736 Approved
0.7188 Intermediate Similarity NPD7332 Phase 2
0.7172 Intermediate Similarity NPD6893 Approved
0.7167 Intermediate Similarity NPD6616 Approved
0.7158 Intermediate Similarity NPD3617 Approved
0.7155 Intermediate Similarity NPD6335 Approved
0.7143 Intermediate Similarity NPD4789 Approved
0.7143 Intermediate Similarity NPD7604 Phase 2
0.713 Intermediate Similarity NPD6868 Approved
0.713 Intermediate Similarity NPD6274 Approved
0.7128 Intermediate Similarity NPD6117 Approved
0.7128 Intermediate Similarity NPD6933 Approved
0.7119 Intermediate Similarity NPD5983 Phase 2
0.7117 Intermediate Similarity NPD5345 Clinical (unspecified phase)
0.7113 Intermediate Similarity NPD6902 Approved
0.7107 Intermediate Similarity NPD7078 Approved
0.71 Intermediate Similarity NPD6098 Approved
0.71 Intermediate Similarity NPD4693 Phase 3
0.71 Intermediate Similarity NPD4690 Approved
0.71 Intermediate Similarity NPD5205 Approved
0.71 Intermediate Similarity NPD4689 Approved
0.71 Intermediate Similarity NPD4688 Approved
0.71 Intermediate Similarity NPD4138 Approved
0.7091 Intermediate Similarity NPD6008 Approved
0.7087 Intermediate Similarity NPD5694 Approved
0.7087 Intermediate Similarity NPD6050 Approved
0.7083 Intermediate Similarity NPD7645 Phase 2
0.7069 Intermediate Similarity NPD6317 Approved
0.7065 Intermediate Similarity NPD7152 Approved
0.7065 Intermediate Similarity NPD7150 Approved
0.7065 Intermediate Similarity NPD7151 Approved
0.7059 Intermediate Similarity NPD6904 Approved
0.7059 Intermediate Similarity NPD6673 Approved
0.7059 Intermediate Similarity NPD6080 Approved
0.7059 Intermediate Similarity NPD7285 Clinical (unspecified phase)
0.7053 Intermediate Similarity NPD6116 Phase 1
0.7048 Intermediate Similarity NPD6356 Clinical (unspecified phase)
0.7033 Intermediate Similarity NPD3699 Clinical (unspecified phase)
0.7033 Intermediate Similarity NPD3700 Clinical (unspecified phase)
0.7027 Intermediate Similarity NPD6412 Phase 2
0.7025 Intermediate Similarity NPD6336 Discontinued
0.7019 Intermediate Similarity NPD5133 Approved
0.701 Intermediate Similarity NPD8259 Clinical (unspecified phase)
0.701 Intermediate Similarity NPD4695 Discontinued
0.7009 Intermediate Similarity NPD6314 Approved
0.7009 Intermediate Similarity NPD6313 Approved
0.699 Remote Similarity NPD5692 Phase 3
0.6975 Remote Similarity NPD6909 Approved
0.6975 Remote Similarity NPD6908 Approved
0.6975 Remote Similarity NPD6291 Clinical (unspecified phase)
0.6972 Remote Similarity NPD5091 Approved
0.6967 Remote Similarity NPD8293 Discontinued
0.6961 Remote Similarity NPD7513 Clinical (unspecified phase)

Structure

External Identifiers

PubChem CID   16086526
ChEMBL   CHEMBL496244
ZINC  

Physicochemical Properties

Molecular Weight:  444.32
ALogP:  0.6226
MLogP:  4.1
XLogP:  6.995
# Rotatable Bonds:  12
Polar Surface Area:  77.76
# H-Bond Aceptor:  4
# H-Bond Donor:  3
# Rings:  4
# Heavy Atoms:  32

Download Data

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General Info & Identifiers & Properties  
Structure MOL file  
Source Organisms  
Biological Activities  
Similar NPs/Drugs