Sub Group: Chemical Impurities Catalog Number: 9861 Formula: C43H53NO14 CAS Number: 153381-68-1 Molecular Weight: 807.88 Synonyms:(2b,5b,7a,10b,13a)-4-Acetoxy-13-(((2R,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-3-phenylpropanoyl)oxy)-1,7,10-trihydroxy-