丁烯酮

(+/-)-3,4,8,8a-tetrahydro-8a-methyl-5-methoxycarbonyl-1,6(2H,7H)-naphthalenedione

(8a'-methyl-3',4',8',8a'-tetrahydro-2'H,7'H-dispiro[[1,3]dioxolane-2,1'-naphthalene-6',2''-[1,3]dioxolan]-5'-yl)methanol

methyl 8a'-methyl-3',4',8',8a'-tetrahydro-2'H,7'H-dispiro[[1,3]dioxolane-2,1'-naphthalene-6',2''-[1,3]dioxolane]-5'-carboxylate