1-butyl-1a,9b-dihydrophenanthro[9,10-b]azirine

4-nitrobut-1-ene

N,N-二甲基甲酰胺

N-butylammonium cation

2-(1-methylpyridin-1-ium-4-yl)-2-oxo-1-phenylethan-1-ide