(6R,7S)-7-(benzoylamino)-3-(chloromethyl)-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester 100mg

(6R,7S)-7-(benzoylamino)-3-(chloromethyl)-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester 100mg