Sub Group: Chemical Impurities Catalog Number: 9788 Formula: C41H55NO14 Molecular Weight: 785.87 Synonyms:(2b,5b,7a,10b,13a)-4-Acetoxy-13-(((2R,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-3-phenylpropanoyl)oxy)-1,7,10-trihydroxy- 9-oxo-5,20-epoxytax-11-e