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=C2C3=C(C=C1)C(O)[C@]([N@@+](CC4CC4)([O-])CC5)([H])[C@@]6(C[C@@]7([C@](C)(O)C(C)(C)C)[H])[C@]35[C@](O2)([H])[C@@]7(OC)CC6