Natural Product: NPC167606

Natural Product IDNPC167606
Common Name
?
The InCHIKey will be temporarily assigned as the "Common Name" if no IUPAC name or alternative short name is available.
Withaferin A
IUPAC Name n.a.
Synonyms NSC-101088
Synthetic Gene Cluster n.a.
ChEMBL Identifier CHEMBL1221986
PubChem CID 49864510
Chemical Classification
  • CHEMONTID:0000000 [Organic compounds]
    • [CHEMONTID:0000012] Lipids and lipid-like molecules
      • [CHEMONTID:0000258] Steroids and steroid derivatives
        • [CHEMONTID:0001125] Steroid lactones
          • [CHEMONTID:0001560] Withanolides and derivatives

The Chemical Classification was calculated by Classyfire, a software for chemical taxonomy calculation. Reference: DOI:10.1186/s13321-016-0174-y.

  Chemical Representations

Standard InCHIKey DBRXOUCRJQVYJQ-BZMBVROXSA-N
Standard InCHI InChI=1S/C28H38O6/c1-14-11-21(33-25(32)17(14)13-29)15(2)18-5-6-19-16-12-24-28(34-24)23(31)8-7-22(30)27(28,4)20(16)9-10-26(18,19)3/h7-8,15-16,18-21,23-24,29,31H,5-6,9-13H2,1-4H3/t15-,16-,18+,19-,20-,21-,23-,24+,26+,27-,28+/m0/s1
SMILES OCC1=C(C)C[C@H](OC1=O)[C@H]([C@H]1CC[C@@H]2[C@]1(C)CC[C@H]1[C@H]2C[C@@H]2[C@]3([C@]1(C)C(=O)C=C[C@@H]3O)O2)C

  Calculated Properties

Physi-Chem Properties

Molecular Weight:   470.27 Volume:   483.701
?
Van der Waals volume.
Dense:   0.972 LogP:   2.763
?
The logarithm of the n-octanol/water distribution coefficients.
logD7.4:   3.134
?
The logarithm of the n-octanol/water distribution coefficient at pH=7.4.
LogS:   -4.227
?
The logarithm of aqueous solubility value.
Rotatable Bonds:   3.0 Rigid Bonds:   30.0
TPSA:   96.36
?
Topological Polar Surface Area.
H-Bond Acceptor:   6.0
H-Bond Donor:   2.0 Rings:   6.0
Heavy Atoms:   6.0

MedChem Properties

QED Drug-Likeness Score:   0.485 GASA:   1.0
?
GASA represents the probability of being difficult to synthesize, ranging from 0 to 1.
Synthetic Accessibility Score:   5.721 Fsp3:   0.786
MCE-18:   141.96
?
MCE-18 stands for medicinal chemistry evolution.MCE-18≥45 is considered a suitable value.
Lipinski Rule-of-5:   Rejected
Pfizer Rule:   Rejected GSK Rule:   Accepted
Golden Triangle Rule:   Rejected BMS Rule:   0
Chelating Alert:   0 PAINS Alert:   0
Colloidal aggregators:   0.596 Fluc inhibitor:   0.099
?
The fluc inhibitor value is the probability of being fLuc inhibitors, within the range of 0 to 1.
Blue fluorescence:   0.008
?
The blue fluorescence value is the probability of being blue fluorescence, within the range of 0 to 1
Green fluorescence:   0.0
?
The green fluorescence value is the probability of being green fluorescence, within the range of 0 to 1
Reactive compounds:   0.166 Promiscuous compounds:   0.564

ADMET Properties (ADMETlab3.0)

ADMET: Absorption

Caco-2 Permeability:   -5.165 MDCK Permeability:   -4.975
Pgp-inhibitor:   0.77 Pgp-substrate:   0.006
PAMPA:   0.019
?
The experimental data for Peff was logarithmically transformed (logPeff). Molecules with log Peff values below 2.0 were classified as low-permeability (Category 0), while those with log Peff values exceeding 2.5 were classified as high-permeability (Category 1).
Human Intestinal Absorption (HIA):   0.001
20% Bioavailability (F20%):   0.009 30% Bioavailability (F30%):   0.496
50% Bioavailability (F50%):   0.877

ADMET: Distribution

Blood-Brain-Barrier Penetration (BBB):   0.085 MRP1:   0.304
Plasma Protein Binding (PPB):   77.846% Volume Distribution (VD):   -0.124
Fu: 19.004%
?
The fraction unbound in plasms.
OATP1B1 inhibitor:   1.0
OATP1B3 inhibitor:   1.0 BCRP inhibitor:   0.045
BSEP inhibitor:   0.994

ADMET: Metabolism

CYP1A2-inhibitor:   0.001 CYP1A2-substrate:   0.0
CYP2C19-inhibitor:   0.222 CYP2C19-substrate:   0.0
CYP2C9-inhibitor:   0.001 CYP2C9-substrate:   0.0
CYP2D6-inhibitor:   0.006 CYP2D6-substrate:   0.0
CYP3A4-inhibitor:   0.006 CYP3A4-substrate:   0.984
CYP2B6-substrate:   0.0 CYP2C8-inhibitor:   0.983
HLM stability:   0.47
?
Human liver microsomal (HLM) stability. Category 0: stable+ (HLM > 30 min); Category 1: unstable- (HLM ≤ 30 min). The output value is the probability of human liver microsomal instability, where a value closer to 1 indicates a higher likelihood of instability.

ADMET: Excretion

Clearance (CL):  9.291 Half-life (T1/2):  1.37

ADMET: Toxicity

hERG Blockers:  0.039 hERG Blockers (10um):  0.177
Human Hepatotoxicity (H-HT):  0.615 Drug-induced Liver Injury (DILI):  0.749
AMES Toxicity:  0.869 Rat Oral Acute Toxicity:  0.342
Maximum Recommended Daily Dose:  0.766 Skin Sensitization:  0.999
Carcinogencity:  0.987 Eye Corrosion:  0.022
Eye Irritation:  0.724 Respiratory Toxicity:  0.851
Drug-induced Neurotoxicity:  0.12 Ototoxicity:  0.527
Hematotoxicity:  0.601 Drug-induced Nephrotoxicity:  0.861
Genotoxicity:  0.895 RPMI-8226 Immunitoxicity:  0.104
A549 Cytotoxicity:  0.096 Hek293 Cytotoxicity:  0.648
BCF:   1.515
?
Bioconcentration factors are used for considering secondary poisoning potential and assessing risks to human health via the food chain. The unit is -log10[(mg/L)/(1000*MW)].
IGC50:   4.114
?
48 hour Tetrahymena pyriformis IGC50. The unit of IGC50 is -log10[(mg/L)/(1000*MW)].
LC50DM:   5.886
?
48 hour Daphnia magna LC50. The unit of LC50DM is -log10[(mg/L)/(1000*MW)].
LC50FM:   5.169
?
96 hour fathead minnow LC50. The unit of LC50FM is -log10[(mg/L)/(1000*MW)].

  Species Source

Organism ID Organism Name Taxonomy Level Family SuperKingdom Isolation Part Collection Location Collection Time Reference
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. DOI[10.1007/s11240-013-0297-z]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. leaf n.a. DOI[10.1016/0031-9422(75)85035-7]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. DOI[10.1016/j.indcrop.2015.06.012]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. DOI[10.1016/j.jarmap.2018.11.004]
NPO15698 Withania somnifera Species Solanaceae Eukaryota roots n.a. n.a. PMID[17190461]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[19056281]
NPO7729 Vassobia breviflora Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[20726569]
NPO14874 Physalis longifolia Species Solanaceae Eukaryota aerial parts n.a. n.a. PMID[22098611]
NPO14874 Physalis longifolia Species Solanaceae Eukaryota n.a. aerial part n.a. PMID[22098611]
NPO20281 Withania aristata Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[22705001]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[24079846]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[26169123]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[30776236]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. PMID[36350950]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. Database[Article]
NPO20281 Withania aristata Species Solanaceae Eukaryota n.a. n.a. n.a. Database[COCONUT]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. Database[COCONUT]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. Database[HerDing]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. Database[TCMID]
NPO15698 Withania somnifera Species Solanaceae Eukaryota n.a. n.a. n.a. Database[UNPD]
NPO14874 Physalis longifolia Species Solanaceae Eukaryota n.a. n.a. n.a. Database[UNPD]
NPO20281 Withania aristata Species Solanaceae Eukaryota n.a. n.a. n.a. Database[UNPD]

Note for Reference:
In addition to directly collecting NP source organism data from primary literature (where reference will provided as NCBI PMID or DOI links), NPASS also integrated them from below databases:
UNPD: Universal Natural Products Database [PMID: 23638153].
StreptomeDB: a database of streptomycetes natural products [PMID: 33051671].
TM-MC: a database of medicinal materials and chemical compounds in Northeast Asian traditional medicine [PMID: 26156871].
TCM@Taiwan: a Traditional Chinese Medicine database [PMID: 21253603].
TCMID: a Traditional Chinese Medicine database [PMID: 29106634].
TCMSP: The traditional Chinese medicine systems pharmacology database and analysis platform [PMID: 24735618].
HerDing: a herb recommendation system to treat diseases using genes and chemicals [PMID: 26980517].
MetaboLights: a metabolomics database [PMID: 27010336].
FooDB: a database of constituents, chemistry and biology of food species [www.foodb.ca].



  NP Quantity Composition/Concentration

Organism ID Organism Name Organism Material Preparation Organism Part NP Quantity (Standard) NP Quantity (Minimum) NP Quantity (Maximum) Quantity Unit Reference

Note for Reference:
In addition to directly collecting NP quantitative data from primary literature (where reference will provided as NCBI PMID or DOI links), NPASS also integrated NP quantitative records for specific NP domains (e.g., NPS from foods or herbs) from domain-specific databases. These databases include:
DUKE: Dr. Duke's Phytochemical and Ethnobotanical Databases.
PHENOL EXPLORER: is the first comprehensive database on polyphenol content in foods [PMID: 24103452], its homepage can be accessed at here.
FooDB: a database of constituents, chemistry and biology of food species [www.foodb.ca].



 Biological Activity

Molecular-level activity

Target ID Target Type Target Name Target Organism Activity Type Activity Relation Value Unit Reference
NPT979 Individual protein Caspase-3 Homo sapiens FC = 1.0 n.a. PMID[21044847]
NPT4377 Individual protein Heat shock 70 kDa protein 6 Homo sapiens FC = 1.35 n.a. PMID[18232640]
NPT728 Individual protein Serine/threonine-protein kinase AKT Homo sapiens Activity = 2.5 uM PMID[24273638]

In vitro activity

Target ID Target Type Target Name Target Organism Activity Type Activity Relation Value Unit Reference
NPT65 Cell line HepG2 Homo sapiens IC50 = 0.06 ug.mL-1 PMID[22691154]
NPT83 Cell line MCF7 Homo sapiens IC50 = 0.05 ug.mL-1 PMID[18183025]
NPT81 Cell line A549 Homo sapiens IC50 = 0.02 ug.mL-1 PMID[17850214]
NPT82 Cell line MDA-MB-231 Homo sapiens IC50 = 0.02 ug.mL-1 PMID[17850214]
NPT171 Cell line MRC5 Homo sapiens IC50 = 0.07 ug.mL-1 PMID[18183025]
NPT83 Cell line MCF7 Homo sapiens Inhibition = 50.0 % PMID[25232969]
NPT169 Cell line B16-F10 Mus musculus IC50 = 290.0 nM PMID[22931472]
NPT170 Cell line SK-MEL-28 Homo sapiens IC50 = 4000.0 nM PMID[26636180]
NPT165 Cell line HeLa Homo sapiens IC50 = 3000.0 nM PMID[25682561]
NPT81 Cell line A549 Homo sapiens IC50 = 6600.0 nM PMID[23398362]
NPT165 Cell line HeLa Homo sapiens IC50 = 2300.0 nM PMID[26046820]
NPT81 Cell line A549 Homo sapiens IC50 = 1500.0 nM PMID[17190457]
NPT83 Cell line MCF7 Homo sapiens IC50 = 3600.0 nM PMID[26848627]
NPT83 Cell line MCF7 Homo sapiens IC50 = 600.0 nM PMID[25682561]
NPT189 Cell line Vero Chlorocebus aethiops IC50 = 1300.0 nM DrugMatrix in vivo data: Pathology
NPT189 Cell line Vero Chlorocebus aethiops IC50 = 1700.0 nM PMID[19053514]
NPT189 Cell line Vero Chlorocebus aethiops Ratio IC50 < 1.0 n.a. PMID[19433554]
NPT171 Cell line MRC5 Homo sapiens Ratio IC50 = 0.19 n.a. PMID[23252848]
NPT171 Cell line MRC5 Homo sapiens IC50 = 200.0 nM PMID[19581457]
NPT380 Cell line U-251 Homo sapiens IC50 = 690.0 nM PMID[20550123]
NPT90 Cell line DU-145 Homo sapiens Activity = 24.75 % PMID[15217282]
NPT90 Cell line DU-145 Homo sapiens Activity = 36.75 % PMID[26073007]
NPT306 Cell line PC-3 Homo sapiens Activity = 60.7 % PMID[18183025]
NPT306 Cell line PC-3 Homo sapiens Activity = 62.7 % PMID[18715034]
NPT171 Cell line MRC5 Homo sapiens IC50 = 2700.0 nM PMID[24359277]
NPT170 Cell line SK-MEL-28 Homo sapiens IC50 = 1000.0 nM DOI[10.1007/s00044-011-9808-9]
NPT82 Cell line MDA-MB-231 Homo sapiens IC50 = 540.0 nM PMID[21377877]
NPT858 Cell line LNCaP Homo sapiens IC50 = 870.0 nM PMID[17261619]
NPT306 Cell line PC-3 Homo sapiens IC50 = 410.0 nM DOI[10.1007/s00044-011-9767-1]
NPT83 Cell line MCF7 Homo sapiens IC50 = 570.0 nM PMID[16510283]
NPT397 Cell line NCI-H460 Homo sapiens IC50 < 400.0 nM PMID[16441066]
NPT395 Cell line SF-268 Homo sapiens IC50 < 400.0 nM PubChem BioAssay data set
NPT859 Cell line HFF Homo sapiens IC50 > 6800.0 nM PMID[12880316]
NPT90 Cell line DU-145 Homo sapiens IC50 = 2500.0 nM PMID[25066952]
NPT83 Cell line MCF7 Homo sapiens IC50 = 6300.0 nM PMID[17850214]
NPT82 Cell line MDA-MB-231 Homo sapiens IC50 = 500.0 nM PMID[9249973]
NPT83 Cell line MCF7 Homo sapiens IC50 = 1300.0 nM PMID[18616221]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. GI50 = 620.0 nM PMID[19056281]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 500.0 nM PMID[20726569]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 800.0 nM PMID[23252848]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 2000.0 nM PMID[20726569]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 2200.0 nM PMID[20726569]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 1100.0 nM PMID[23252848]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 780.0 nM PMID[24273633]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 1000.0 nM PMID[24273633]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. Inhibition > 80.0 % PMID[24625088]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 970.0 nM PMID[24625088]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 250.0 nM PMID[24625088]
NPT20529 Non-molecular NON-PROTEIN TARGET n.a. IC50 = 1600.0 nM PMID[26169123]
NPT2 Others Unspecified n.a. IC50 = 250.0 nM PubChem BioAssay data set
NPT2 Others Unspecified n.a. Activity = 42.0 % PMID[23891163]
NPT2 Others Unspecified n.a. Activity = 49.0 % PMID[23891163]
NPT2 Others Unspecified n.a. Activity = 34.0 % PMID[23891163]
NPT2 Others Unspecified n.a. Activity = 36.0 % PMID[23891163]
NPT2 Others Unspecified n.a. Activity = 12.0 % PMID[21741249]
NPT2 Others Unspecified n.a. Activity = 8.0 % PMID[16933872]
NPT2 Others Unspecified n.a. Activity = 14.8 % PMID[16933872]
NPT2 Others Unspecified n.a. FC = 2.1 n.a. PMID[19124661]
NPT2 Others Unspecified n.a. IC50 = 500.0 nM PMID[23891163]

In vivo activity

Target ID Target Type Target Name Target Organism Activity Type Activity Relation Value Unit Reference
NPT32 Organism Mus musculus Mus musculus MTD <= 50.0 mg kg-1 PMID[24625088]





 Experimental ADME

Experiment Model Experiment Tissue ADME Type ADME Relation ADME Value ADME Unit Reference





 Experimental Toxicity

Quantitative toxicity

Experiment Model Experiment Organism Toxicity Type Toxicity Relation Toxicity Value Toxicity Unit Reference

Common Abbreviations:
LC: Lethal Concentration; LD: Lethal Dose; LT:Lethal Time; NOAEL: No-observed-adverse-effect Level; BMDL: Benchmark Dose Lower Confidence Limit; BMD: Benchmark Dose; BMC:Benchmark Concentration; LOAEL: Lowest Observed Adverse Effect Level; RfD:Reference Dose; RfC:Reference Concentration; MRL: Minimal Risk Level; MEG: Maximum Exposure Guideline; PAC: Protective Action Criteria

Categorical toxicity labels

Hepatotoxicity Carcinogenicity Mutagenicity Cardiotoxicity Respiratory Toxicity Eye Irritation Endocrine Disruption
Hepatotoxicity Carcinogenicity Mutagenicity Cardiotoxicity Respiratory Toxicity Eye Irritation Endocrine Disruption

Note for Reference:
In addition to directly collecting NP quantitative data from primary literature (where reference will provided as NCBI PMID or DOI links), NPASS also integrated NP toxicity records from domain-specific databases. These databases include:
ToxValDB: a curated database that compiles quantitative toxicity values for chemicals from diverse public sources to support toxicological research and risk assessment.
TOXRIC: a comprehensive, free-to-access, online database providing toxicological/feature data. The toxicity labels are retrieved from this database. [PMID: 36400569]


  Chemically structural similarity

Similar Active Natural Products in NPASS

Top-200 similar NPs were calculated against the active-NP-set (includes approximately 50,000 NPs with experimentally-derived bioactivity available in NPASS)

Similarity is measured using the Tanimoto coefficient (Tc) , which compares the binary fingerprints of two molecules. Tc is calculated as the intersection divided by the union of '1' bits in the fingerprints, ranging from 0 to 1, with 1 indicating highest similarity.

●  The left chart: Distribution of similarity level between NPC167606 and all remaining natural products in the NPASS database.
●  The right table: Most similar natural products (Tc>=0.5 or Top200).

Similarity Score Similarity Level Natural Product ID
1.0 High Similarity NPC140055
0.875 High Similarity NPC286528
0.8485 Intermediate Similarity NPC709
0.8 Intermediate Similarity NPC20302
0.7778 Intermediate Similarity NPC470494
0.7536 Intermediate Similarity NPC50774
0.75 Intermediate Similarity NPC312824
0.7429 Intermediate Similarity NPC470265
0.7391 Intermediate Similarity NPC243065
0.7368 Intermediate Similarity NPC3381
0.726 Intermediate Similarity NPC264954
0.7222 Intermediate Similarity NPC474370
0.7183 Intermediate Similarity NPC284915
0.7183 Intermediate Similarity NPC122056
0.7183 Intermediate Similarity NPC268530
0.7083 Intermediate Similarity NPC154491
0.7037 Intermediate Similarity NPC231240
0.6757 Remote Similarity NPC159456
0.6579 Remote Similarity NPC470492
0.6533 Remote Similarity NPC183580
0.6456 Remote Similarity NPC120994
0.64 Remote Similarity NPC609580
0.6316 Remote Similarity NPC88326
0.6264 Remote Similarity NPC316915
0.6173 Remote Similarity NPC203702
0.6133 Remote Similarity NPC250312
0.6104 Remote Similarity NPC470493
0.5974 Remote Similarity NPC473274
0.5949 Remote Similarity NPC67569
0.5946 Remote Similarity NPC69291
0.5897 Remote Similarity NPC4021
0.5867 Remote Similarity NPC67259
0.5867 Remote Similarity NPC91034
0.5844 Remote Similarity NPC270929
0.5844 Remote Similarity NPC30923
0.5844 Remote Similarity NPC610236
0.5823 Remote Similarity NPC153700
0.575 Remote Similarity NPC251226
0.575 Remote Similarity NPC8369
0.575 Remote Similarity NPC600975
0.575 Remote Similarity NPC602010
0.5696 Remote Similarity NPC470878
0.5658 Remote Similarity NPC474315
0.5641 Remote Similarity NPC156797
0.56 Remote Similarity NPC220155
0.5584 Remote Similarity NPC147912
0.5556 Remote Similarity NPC608655
0.5542 Remote Similarity NPC23786
0.5542 Remote Similarity NPC473593
0.55 Remote Similarity NPC61520
0.55 Remote Similarity NPC470495
0.5488 Remote Similarity NPC609769
0.5488 Remote Similarity NPC610140
0.5432 Remote Similarity NPC473253
0.5422 Remote Similarity NPC606886
0.525 Remote Similarity NPC230513
0.5244 Remote Similarity NPC8374
0.5244 Remote Similarity NPC473256
0.5238 Remote Similarity NPC470880
0.5185 Remote Similarity NPC186525
0.5185 Remote Similarity NPC125794
0.5185 Remote Similarity NPC171401
0.5128 Remote Similarity NPC285956
0.5122 Remote Similarity NPC329736
0.5122 Remote Similarity NPC599946
0.506 Remote Similarity NPC329671

Similar Clinical/Approved Drugs

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

●  The left chart: Distribution of similarity level between NPC167606 and all drugs/candidates.
●  The right table: Most similar clinical/approved drugs (Tc>=0.5 or Top200).

Similarity Score Similarity Level Drug ID Developmental Stage
1.0 High Similarity NPD7115 Discovery

Bioactivity similarity

  Bioactivity similarity

Similar Natural Products in NPASS

Similarity level is defined by Bioactivity similarity was calculated based on bioactivity descriptors of compounds. The bioactivity descriptors were calculated by a recently developed AI algorithm Chemical Checker (CC) [Nature Biotechnology, 38:1087–1096, 2020; Nature Communications, 12:3932, 2021], which evaluated bioactivity similarities at five levels:
A: chemistry similarity;
B: biological targets similarity;
C: networks similarity;
D: cell-based bioactivity similarity;
E: similarity based on clinical data.
Those 5 categories of CC bioactivity descriptors were calculated and then subjected to manifold projection using UMAP algorithm, to project all NPs on a 2-Dimensional space. The current NP was highlighted with a small circle in the 2-D map. Below figures: left-to-right, A-to-E.

A: chemistry similarity
B: biological targets similarity
C: networks similarity
D: cell-based bioactivity similarity
E: similarity based on clinical data