4-hydroxy-3,7-dimethoxy-17-methyl-7,8-didehydromorphinan-6-one InChI=1/C19H23NO4/c1-20-7-6-19-10-14(21)16(24-3)9-12(19)13(20)8-11-4-5-15(23-2)18(22)17(11)19/h4-5,9,12-13,22H,6-8,10H2,1-3H morphinan-6-one, 7,8-didehydro-4-hydroxy-3,7-dimethoxy-17-methyl-