اگه منظورتان putrescine هست، نوعی آمینه با فرمول NH2(CH2)4NH2 که بوتان دی آمین هم نامیده میشه
Putrescine attacks decarboxylated S-adenosyl methionine and gets converted to spermidine. Spermidine in turn attacks another decarboxylated S-adenosyl methionine and gets converted to spermine...