methyl 2-sulfanylidene-3H-1,3-benzoxazole-7-carboxylate

二甲基2-氨基-3-氧代吩恶嗪-4,6-二羧酸酯

methyl 2-hydroxy-3-(benzoylamino)benzoate

methyl 3-benzamido-2-benzoyloxybenzoate

methyl 3-[(3,5-dichlorobenzoyl)amino]-2-hydroxybenzoate