17-methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diol InChI=1/C17H19NO3/c1-18-7-6-17-10-3-5-13(20)16(17)21-15-12(19)4-2-9(14(15)17)8-11(10)18/h2-5,10-11,13,16,19-20H,6-8H2,1H morphinan-3,6-diol, 7,8-didehydro-4,5-epoxy-17-methyl-