(E)-(1aS,3aR,6bR)-1-oxo-5-[2-oxo-1-pyridin-3-yl-pyrrolidin-3-ylidenemethyl]-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diaza-cyclobut[cd]indene-6-carboxylic acid trifluoroacetate 生成 (E)-(1aS,3aR,6bR)-1-oxo-5-[2-oxo-1-pyridin-3-yl-pyrrolidin-3-ylidenemethyl]-2-trifluoroacetyl-1a,2,3,3a,4,6b-hexahydro-1H-2,6a-diaza-cyclobut[cd]indene-6-carboxylic acid sodium salt