N-(α-furoyl)-α-(p-anisidino)propionic acid 、
γ-(p-Anisidino)-buttersaeuremethylester 以produces methyl N-[N-(2-furoyl)-2-(p-anisidino)propionyl]-4-(p-anisidino)butyrate (oil), saponification of which and processing of the reaction product的产率得到methyl N-[N-(2-furoyl)-2-(p-anisidino)propionyl]-4-(p-anisidino)butyrate