3β,6β-Bis(2-methylacryloyloxy)-9-oxoeuryopsin

(4S)-4,4a,5,6-Tetrahydro-4β,6β-bis(2-methylacryloyloxy)-3,4aβ,5β-trimethylnaphtho[2,3-b]furan-9(7H)-one

(4S)-4a,5,6,7-Tetrahydro-4,6β-dihydroxy-3,4aβ,5β-trimethylnaphtho[2,3-b]furan-9(4H)-one 4,6-bis(2-methylpropenoate)