(-)-17-(Cyclobutylmethyl)morphinan-3,14-diol 17-(CYCLOBUTYLMETHYL)MORPHINAN-3,14-DIOL 42408-82-2 Butorfanol Butorfanol [INN-Spanish] Butorphanol Butorphanol [USAN:BAN:INN] Butorphanolum [INN-Latin] DEA No. 9720 EINECS 255-808-8 Morphinan-3,14-diol, 17-(cyclobutylmethyl)- l-BC 2627 levo-BC-2627