... MW:287.43 CAS:76855-694 Name: 4-AA4-acetoxyazetidin-2-one (4-AA , 4-ABA or 4-AOSA),(3R,4R ... . or (3R,4R)-4-Acetoxy-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]azetidin-2-oneCAS No.: 76855-69-1Assay: ≥99%MF: C13H25NO4SiMW: 287 ... (c=0.98 CHCl3)Mp: 104-108°CContaining Water: ≤0.2%Capacity: 3000-5000KGs/month 4-AA/(3S,4R)-4-Acetoxy ...