BUPRENORPHINE-D4

6,14-Ethenomorphinan-7-methanol, 17-(cyclopropyl-2,2-d2)methyl-d2-.alpha.-(1,1-dimethylethyl)-4,5-epoxy-18,19-dihydro-3-hydroxy-6-methoxy-.alpha.-methyl-, (.alpha.S,5.alpha.,7.alpha.)-