preferred_name: 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