methyl 2-oxo-2-(phenylmethoxycarbonylamino)acetate

3,7-dichloro-1-(2-propoxyethyl)pyrido[3,4-b]pyrazin-2-one

methyl 2-(2,6-difluoroanilino)-2-oxoacetate

Methyl {[2-(2-methyl-2-propanyl)phenyl]amino}(oxo)acetate

1-O-methyl 2-O-prop-1-enyl oxalate