(1S,7R,8aS)-1,8a-dihydroxy-7-methyl-6,8-dioxo-3-(E-prop-1-enyl)- 6,7,8,8a-tetrahydro-1H-isochromen-7-yl 2,4-dihydroxy-6-methylbenzoate
(1s,7r,8as)-1,8a-dihydroxy-7-methyl-6,8-dioxo-3-(e-prop-1-enyl)- 6,7,8,8a-tetrahydro-1h-isochromen-7-yl 2,4-dihydroxy-6-methylbenzoate