Synonyms: Cycloprop[e]indene-6b(1H)-carboxylicacid, 1a,2-diformyl-1a,3a,4,5,6,6a-hexahydro-5,5-dimethyl-, methyl ester,(1aR,3aS,6aS,6bS)- (9CI); Cycloprop[e]indene-6b(1H)-carboxylic acid,1a,2-diformyl-1a,3a,4,5,6,6a-hexahydro-5,5-dimethyl-, methyl ester, [1aR-(1aa,3ab,6ab,6ba)]-; Marasmic acid, methyl ester(7CI); Methyl marasmate