3-(5,5-ethylenedioxy-6-methylheptanoyl)-1,5-dimethoxy-4-methoxymethoxynaphthalene

methyl 4-(1'-t-butyldimethylsilyloxy-4'-hydroxy-5'-methoxy-(6''-methyl-5''-oxoheptanoyl)naphth-2'-yl)-2-butenoate