6-(羟基(氧代)氨基)-2-氧代-2H-苯并吡喃-3-羧酸乙酯

triethyl 1,2,3-tricyanocyclopropane-1,2,3-tricarboxylate

phthalimide

5-氨基-3-三氟甲基-4-吡唑甲酸乙酯

2-oxo-4-phenyl-6-sulfanyl-1H-pyridine-3,5-dicarbonitrile