Buprenorphine Impurity 1

Chemical Name: (3R,4S,4aS,6R,7R,7aR,12bS)-3-(Cyclopropylmethyl)-9,13-dihydroxy-6-((S)-2-hydroxy-3,3-dimethylbutan-2-yl)-7-methoxy-1,2,3,4,5,6,7,7a-octahydro-4a,7-ethano-4,12-methanobenzofuro[3,2-e]isoquinoline 3-oxide

Smile: OC1=C2O[C@]3([H])C4(CC[N+]5([O-])CC6CC6)C2=C(C=C1)C(O)[C@]5([H])C47CCC3(OC)C([C@](C)(O)C(C)(C)C)([H])C7