ETHYL (.ALPHA.R,1R,2R,4R,5S)-4-CYANO-2-((((1,1-DIMETHYLETHYL)DIMETHYLSILYL)OXY)METHYL)-1,4,5,6-TETRAHYDRO-9-METHOXY-.ALPHA.-(6-(METHOXYMETHOXY)-7-METHYL-1,3-BENZODIOXOL-4-YL)-8-METHYL-10-(2-PROPEN-1-YLOXY)-11-((2-PROPEN-1-YLOXY)CARBONYL)-1,5-IMINO-3-BENZAZOCINE-3(2H)-ACETATE
ethyl (.alpha.r,1r,2r,4r,5s)-4-cyano-2-((((1,1-dimethylethyl)dimethylsilyl)oxy)methyl)-1,4,5,6-tetrahydro-9-methoxy-.alpha.-(6-(methoxymethoxy)-7-methyl-1,3-benzodioxol-4-yl)-8-methyl-10-(2-propen-1-yloxy)-11-((2-propen-1-yloxy)carbonyl)-1,5-imino-3-benzazocine-3(2h)-acetate