3-methoxy-17-methyl-7,8-didehydro-4,5-epoxymorphinan-6-ol InChI=1/C18H21NO3/c1-19-8-7-18-11-4-5-13(20)17(18)22-16-14(21-2)6-3-10(15(16)18)9-12(11)19/h3-6,11-13,17,20H,7-9H2,1-2H morphinan-6-ol, 7,8-didehydro-4,5-epoxy-3-methoxy-17-methyl-