(6R,7R)-7-((R)-2-carboxy-2-(4-hydroxyphenyl)acetamido)-7-methoxy-3-(methoxymethyl)-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid
(6R,7R)-7-((R)-2-carboxy-2-(4-hydroxyphenyl)acetamido)-7-methoxy-3-(methoxymethyl)-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid