Synonyms: (+)-PENTAZOCINE;(11R)-1,2,3,4,5,6-Hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-2α,6α-methano-3-benzazocine-8-ol;(2R,11R)-1,2,3,4,5,6-Hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-2α,6α-methano-3-benzazocine-8-ol;[2R,6R,11R,(-)]-1,2,3,4,5,6-Hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-2,6-methano-3-benzazocine-8-ol