(6R,7R)-7-[[(2R)-2-Carboxy-2-(4-hydroxyphenyl)acetyl]amino]-7-methoxy-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2-(diphenylmethyl) ester [ 1187769-84-1 ]