Synonyms: N-Propargylnormorphine;7,8-Didehydro-4,5-alpha-epoxy-17-(2-propynyl)morphinan-3,6-alpha-diol;BRN 0576249;N-2-Propynylnormorphine;Normorphine, N-2-propynyl-;(5alpha,6alpha)-7,8-Didehydro-4,5-epoxy-17-(2-propynyl)morphinan-3,6-diol;Morphinan-3,6-alpha-diol, 7,8-didehydro-4,5-alpha-epoxy-17-(2-propynyl)-;(5alpha,6alpha)-17-prop-2-yn-1-yl-7,8-didehydro-4,5-epoxymorphinan-3,6-diol