label: N(4)-aminopropylspermidine + S-adenosyl 3-(methylsulfanyl)propylamine => N(4)-bis(aminopropyl)spermidine + S-methyl-5'-thioadenosine + H(+)
label_lc: n(4)-aminopropylspermidine + s-adenosyl 3-(methylsulfanyl)propylamine => n(4)-bis(aminopropyl)spermidine + s-methyl-5'-thioadenosine + h(+)