上游原料
2-amino-4-nitrobenzoic acid2-[(4-carboxybenzoyl)amino]-4-nitrobenzoic acid4-amino-2-[(4-carboxybenzoyl)amino]benzoic acid4-[4-oxo-7-(propionylamino)-4H-3,1-benzoxazin-2-yl]benzoic acid4-[[2-(ethoxycarbonyl)-5-(propionylamino)anilino]carbonyl]benzoic acidp-Phthalic acid monomethyl ester chloride; Terephthalic acid monomethyl ester chloride; Methyl 4-chlorocarbonylbenzoate
