Chemical Name:(2S)-2-[17-(Cyclopropylmethyl)-4,5a-epoxy-3-hydroxy-6-methoxy-6a,14-etheno-14a-morphinan-7a-yl]-3,3-dimethylbutan-2-ol (as per EP) ; (S)-2-[17-(Cyclopropylmethyl)-4,5a-epoxy-3-hydroxy-6-methoxy-6a,14-ethenomorphinan-7a-yl]-3,3-dimethylbutan-2-ol (as per USP)
