623906-31-0

(4-nitrophenyl)methyl (5R)-6-[acetoxy(6,8-dihydro-5H-imidazo[2,1-c][1,4]oxazin-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate