上游原料
ethyl 2-aminoacetate; Glycine ethyl ester2H-3,1-benzoxazine-2,4(1H)-dione；Isatoic anhydride;4H-3,1-Benzoxazine-2,4(1H)-dione；1,2-Dihydro-4H-3,1-benzoxazine-2,4-dione;1H-benzo[d][1,3]oxazine-2,4-dioneethyl 2-[(2-aminobenzoyl)amino]acetateethyl 2-[2,4-dioxo-1,4-dihydro-3(2H)-quinazolinyl]acetate4-(bromomethyl)-1,2-dichlorobenzeneethyl 2-[1-(3,4-dichlorobenzyl)-2,4-dioxo-1,4-dihydro-3(2H)-quinazolinyl]acetate
