The molecule is a steroid acid comprising (20R)-20-hydroxypregn-4-en-3-one having a carboxymethyl group attached to the 20-hydroxy function. It is a 3-oxo-Delta(4) steroid, a steroid acid and a monocarboxylic acid.
2-[(1R)-1-[(8S,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]ethoxy]acetic acid