methyl 4-(1'-t-butyldimethylsilyloxy-4'-hydroxy-5'-methoxy-3'-(6'',6''-dimethyl-5''-oxoheptanoyl)naphth-2'-yl)-2-butenoate

3-(5,5-ethylenedioxy-6,6-dimethyl-2-heptenoyl)-1,5-dimethoxy-4-methoxymethoxynaphthalene