(.ALPHA.S,5.ALPHA.,7.ALPHA.)-17-(CYCLOPROPYLMETHYL)-.ALPHA.-(1,1-DIMETHYLETHYL)-4,5-EPOXY-6-METHOXY-.ALPHA.-METHYL-3-(PHENYLMETHOXY)-6,14-ETHENOMORPHINAN-7-METHANOL
(.alpha.s,5.alpha.,7.alpha.)-17-(cyclopropylmethyl)-.alpha.-(1,1-dimethylethyl)-4,5-epoxy-6-methoxy-.alpha.-methyl-3-(phenylmethoxy)-6,14-ethenomorphinan-7-methanol