(1E,3E)-1-methoxy-3-methoxycarbonyl-5-oxo-4-[3-[(2-oxochromene-3-carbonyl)amino]pyridin-1-ium-1-yl]-5-phenylpenta-1,3-dien-1-olate 、
N-苯基马来酰亚胺 生成
2-oxo-2H-chromene-3-carboxylic acid 4-benzoyl-1,3-dioxo-2-phenyl-2,3,3a,4,9a,9b-hexahydro-1H-pyrrolo[3,4-a]indolizin-7-ylamide