CAS NO:25031-06-5|Chemical Formula: C14H22N2O5S|(pivaloyloxy)methyl (2S,5R,6R)-6-amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
CAS NO:72584-25-9|Chemical Formula: C21H35N3O6S|(pivaloyloxy)methyl 2-((azepan-1-ylmethylene)amino)-2-((4S)-5,5-dimethyl-4-(((pivaloyloxy)methoxy)carbonyl)thiaz……