(2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal

3-Keto-4-pregnene-20β-carboxaldehyde

Also known as: (20R)-20-Methylpregna-4-ene-3,21-dione, (20R)-3-oxopregn-4-ene-20-carbaldehyde, (20R)-3-oxopregn-4-ene-20-carboxaldehyde, 3-oxo-23,24-dinor-chol-4-en-21-al, 4-PREGNEN-3-ONE-20β-CARBOXALDEHYDE, Dinorcholenaldehyde, Nsc9137, Phloretin Impurity 1 (Phlorizin), Pregn-4-ene-20-carboxaldehyde, 3-oxo-, (20R)-, Progesterone Impurity 20, Progesterone Impurity 57

(2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal (CAS 66289-21-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C22H32O2 and a molecular weight of 328.48800 g/mol. It is also known as (20R)-20-Methylpregna-4-ene-3,21-dione, (20R)-3-oxopregn-4-ene-20-carbaldehyde and (20R)-3-oxopregn-4-ene-20-carboxaldehyde. Key properties include a boiling point of 459.432ºC at 760 mmHg, a density of 1.074g/cm3 and a flash point of 170.979ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 66289-21-2
Jingsj CID: J-1505967-3
Molecular Formula: C₂₂H₃₂O₂
Chinese Name: 3-Keto-4-pregnene-20β-carboxaldehyde
Molecular Weight: 328.48800 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	459.432ºC at 760 mmHg
Density	1.074g/cm3
Flash Point	170.979ºC

Frequently Asked Questions

What is the CAS number of (2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal?

The CAS number of (2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal is 66289-21-2.

What are the molecular formula and molecular weight of (2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal?

(2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal has molecular formula C22H32O2 and molecular weight 328.48800 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "(2R)-2-[(8S,9S,10R,13S,14S,17R)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]propanal (CAS 66289-21-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1505967-3 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.