37764-29-7 7,8-Didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol N-oxide ditartarate A/VII Morphin-N-oxyd ditartarate [German] Morphinan-3,6-diol, 7,8-didehydro-4,5-epoxy-17-methyl-, N-oxide, ditartarate