hirsutic acid C

(2S,3aα,7aα)-2,3bβ-Dimethyl-4-methylene-5β-hydroxy-6β,6aβ-epoxydecahydro-1H-cyclopenta[a]pentalene-2α-carboxylic acid

6β,6aβ-Epoxy-2,3,3aα,3b,4,5,6,6a,7,7aα-decahydro-5β-hydroxy-2β,3bβ-dimethyl-4-methylene-1H-cyclopenta[a]pentalene-2-carboxylic acid