The molecule is a monocarboxylic acid anion resulting from the deprotonation of the carboxy group of carnosic acid. The major species at pH 7.3. It is an abietane diterpenoid, a carbotricyclic compound and a monocarboxylic acid anion. It is a conjugate base of a carnosic acid.
(4aR,10aS)-5,6-dihydroxy-1,1-dimethyl-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthrene-4a-carboxylate