ethyl 5-benzyl-2-oxo-7-oxa-1,5-diazabicyclo[4.1.0]hept-3-ene-6-carboxylate

乙醇

1,3-dibenzylpyrimidine-2,4-dione

ethyl 3-hydroxy-1-(phenylmethyl)-1H-pyrrole-2-carboxylate

1-苄基嘧啶-2,4,6(1h,3h,5h)-三酮