(-)-(2R,6aR,10aR,10bR)-9-methoxy-6a-methyl-2-phenyl-6,6a,10a,10b-tetrahydro-1H-benzo[f]isochromene-7,10(2H,4H)-dione

(2S,6aR)-2-(furan-3-yl)-9-methoxy-6a-methyl-6,6a-dihydro-1H-benzo[f]isochromene-7,10(2H,4H)-dione

(2R,6aR)-9-methoxy-6a-methyl-2-phenyl-1,4,6,6a-tetrahydro-2H-benzo[f]isochromene-7,10-dione