label: norspermidine + S-methyl-5'-thioadenosine + H(+) => S-adenosyl 3-(methylsulfanyl)propylamine + propane-1,3-diamine
label_lc: norspermidine + s-methyl-5'-thioadenosine + h(+) => s-adenosyl 3-(methylsulfanyl)propylamine + propane-1,3-diamine