2,4-Pentadienoic acid, 5-(4a-(acetyloxy)-3,4,4a,5,6,9-hexahydro-3,7-dimethyl-1-oxo-1H-4,9a-ethanocyclohepta(c)pyran-3-yl)-2-methyl-, (3alpha(2E,4E),4alpha,4aalpha,9aalpha)-(-)- 2,4-Pentadienoic acid, 5-(4a-(acetyloxyl)-3,4,4a,5,6,9-hexahydro-3,7-dimethyl-1-oxo-1H-4,9a-ethanocyclohepta(c)pyran-3-yl)-2-methyl-, (3-alpha(2E,4E),4-alpha,9a-alpha)-(-)- (9CI) 82508-32-5 NSC 615487 Pseudolaric acid A