17α-estradiol   Click here for help

GtoPdb Ligand ID: 12600

Synonyms: 17α-E2 | 17-alpha-Estradiol | 17-epi-Estradiol | 17a-estradiol | Alfatradiol®
Compound class: Metabolite
Comment: 17α-Estradiol is a minor and weak endogenous steroidal estrogen. It is the C17 epimer of estradiol.

17α-estradiol is commercially available from our sponsors

2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 2
Hydrogen bond donors 2
Rotatable bonds 0
Topological polar surface area 40.46
Molecular weight 272.38
XLogP 3.47
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES C[C@@]12CC[C@@H]3C4=CC=C(C=C4CC[C@H]3[C@@H]2CC[C@H]1O)O
Isomeric SMILES C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@H]2O)CCC4=C3C=CC(=C4)O
InChI InChI=1S/C18H24O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h3,5,10,14-17,19-20H,2,4,6-9H2,1H3/t14-,15-,16+,17-,18+/m1/s1
InChI Key VOXZDWNPVJITMN-SFFUCWETSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
Classification Click here for help
Compound class Metabolite
IUPAC Name Click here for help
(8R,9S,13S,14S,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol
Synonyms Click here for help
17α-E2 | 17-alpha-Estradiol | 17-epi-Estradiol | 17a-estradiol | Alfatradiol®
Database Links Click here for help
BindingDB Ligand 20624
ChEBI CHEBI:17160
ChEMBL Ligand CHEMBL286452
GtoPdb PubChem SID 479821390
LIPID MAPS LMST02010029
PubChem CID 68570
Search Google for chemical match using the InChIKey VOXZDWNPVJITMN-SFFUCWETSA-N
Search Google for chemicals with the same backbone VOXZDWNPVJITMN
UniChem Compound Search for chemical match using the InChIKey VOXZDWNPVJITMN-SFFUCWETSA-N
UniChem Connectivity Search for chemical match using the InChIKey VOXZDWNPVJITMN-SFFUCWETSA-N

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MedChemExpress
Alpha-Estradiol (links to external site)
Cat. No. HY-B0141A
Alpha-Estradiol (Standard) (links to external site)
Cat. No. HY-B0141AR