the method is based on the transfer of the propylamine moiety of decarboxylated s-adenosylmethionine to labeled putrescine , followed by ion-exchange separation of the labeled amine substrate and product , which are then converted to the 5-dimethylamino-1-napthalene sulfonyl ( dansyl ) derivatives and further purified and identified by thin layer chromatography .
C0033504
propylamine
C0002508
amine