(6R,6β)-3-[(Acetyloxy)methyl]-7α-[[(Z)-(2-formylamino-4-thiazolyl)(methoxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

[6R-[6alpha,7beta(Z)]]-3-(acetoxymethyl)-7-[[2-(formylamino)thiazol-4-yl](methoxyimino)acetamido]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid