CAS No 162784-72-7 , Benzenepropanoic acid, b-[[(1,1-dimethylethoxy)carbonyl]amino]-a-hydroxy-,(2aR,4R,4aS,9S,11S,12S,12aR,12bS)-12b-(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5,6-dioxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-ylester, (aR,bS)-