The molecule is an oxime O-ether consisting of progesterone having an O-(carboxymethyl)oxime group at the 3-position. It is an oxime O-ether, a 20-oxo steroid and a monocarboxylic acid. It derives from a progesterone.
2-[(E)-[(8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-ylidene]amino]oxyacetic acid