The molecule is a 3-oxo monocarboxylic acid anion that is the conjugate base of 4'-O-demethylsordarin, arising from deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a 4'-O-demethylsordarin.
(1R,2S,4R,5R,8R,9S,11R)-9-formyl-5-methyl-13-propan-2-yl-2-[[(2R,3S,4R,5S,6R)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxymethyl]tetracyclo[7.4.0.02,11.04,8]tridec-12-ene-1-carboxylate