codeine(-)-Codeine(1S,13R,14S,17R)-10-methoxy-4-methyl-12-oxa-4-azapentacyclo[9.6.1.0(1,13).0(5,17).0(7,18)]octadeca-7(18),8,10,15-tetraen-14-ol(5alpha,6alpha)-7,8-Didehydro-4,5-epoxy-3-methoxy-17-methylmorphinan-6-ol7,8-didehydro-4,5alpha-epoxy-3-methoxy-17-methylmorphinan-6alpha-olCodeinCodeineO(3)-methylmorphinecodeine anhydrousl-codeinemethylmorphinemorphine 3-methyl ethermorphine monomethyl ethermorphine-3-methyl ether