2H,4a.alpha.H-1,4,5-Trioxa-1H-dicyclopent[a,hi]indene-7-carboxylic acid, 3-ethylidene-3,3a.beta.,7a.alpha.,9b.alpha.-tetrahydro-2-oxo-, methyl ester 2H,4aH-1,4,5-Trioxadicyclopent[a,hi]indene-7-carboxylic acid, 3-ethylidene-3,3a,7a,9b-tetrahydro-2-oxo-, methyl ester, [3aS-(3E,3a.alpha.,4a.beta.,7a.beta.,9aR*,9b.beta.)]- 77-16-7 NSC112152 PLUMERICINE Plumericin