623906-30-9

4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,6-[(acetyloxy)imidazo[1,2-a]quinoxalin-2-ylmethyl]-6-bromo-7-oxo-,(4-nitrophenyl)methyl ester, (5R)-