Buprenorphine EP Impurity G

Chemical Name: 17,17′-di(cyclopropylmethyl)-4,5α;4′,5α′-diepoxy-7α,7α′-di[(1S)-1-hydroxy-1,2,2-trimethylpropyl]-6,6′-dimethoxy-2,2′-bi(6α,14-ethano-14α-morphinan)-3,3′-diol (as per EP)

Synonym: 2,2′-bibuprenorphine (EP)