[2R-(2a,6a,7a)]-7-(benzoylamino)-3-methyl-8-oxo-5-Oxa-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid diphenylmethyl ester

[2R-(2a,6a,7a)]-7-(benzoylamino)-3-methyl-8-oxo-5-Oxa-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid diphenylmethyl ester · CAS 68314-21-6

[2R-(2a,6a,7a)]-7-(benzoylamino)-3-methyl-8-oxo-5-Oxa-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic acid diphenylmethyl ester