1,4-Bis(normorphino)-2-butyne dimethiodide 90462-52-5 Morphinanium, 17,17'-(2-butynylene)bis(7,8-didehydro-3,6-alpha-dihydroxy-4,5-alpha-epoxy-17-methyl-, diiodide N,N'-2-Butynylenebis(morphinium iodide)