Synonyms: D(17a)-Homo-C,18-dinordammara-9(11),24-dien-26-oicacid, 17a-methylene-3-oxo-, (13a,24Z)-; (-)-Neokadsuranic acid A; 2-Heptenoic acid,2-methyl-6-(2,3,4,4a,5,6,6a,6b,7,8,9,10,10a,11b-tetradecahydro-4,4,6b,11b-tetramethyl-10-methylene-3-oxo-1H-benzo[a]fluoren-9-yl)-,[4aR-[4aa,6ab,6ba,9b(2Z,6R*),10aa,11bb]]-; Neokadsuranic acid A