93588-97-7

5-Oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-[[[3,4-bis(acetyloxy)phenyl][[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]acetyl]amino]-7-(formylamino)-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-, diphenylmethyl ester