1,4-naphthalenedione, 6-ethenyl-5,6,7,8-tetrahydro-2,3-dimethoxy-6-methyl-7-(1-methylethenyl)- 7-Isopropenyl-2,3-dimethoxy-6-methyl-6-vinyl-5,6,7,8-tetrahydro-[1,4]naphthoquinone 7-Isopropenyl-2,3-dimethoxy-6-methyl-6-vinyl-5,6,7,8-tetrahydronaphthalene-1,4-dione Heliotropinone A InChI=1/C18H22O4/c1-7-18(4)9-12-11(8-13(18)10(2)3)14(19)16(21-5)17(22-6)15(12)20/h7,13H,1-2,8-9H2,3-6H