2-(2-methoxycarbonylanilino)-4-nitrobenzoic acid

2-氯-4-羟基-5-硝基苯甲酸

2-(4-methylphenoxy)-4-nitrobenzoic acid

2-(4-甲氧基-苯基氨基)-4-硝基苯甲酸

2-(2-carboxy-5-nitrophenyl)-4-nitrobenzoic acid