preferred_name: putrescine + S-adenosyl-L-methionine = N-methylputrescine + S-adenosyl-L-homocysteine + H(+)
preferred_name_lc: putrescine + s-adenosyl-l-methionine = n-methylputrescine + s-adenosyl-l-homocysteine + h(+)
label: putrescine + S-adenosyl-L-methionine = N-methylputrescine + S-adenosyl-L-homocysteine + H(+)
label_lc: putrescine + s-adenosyl-l-methionine = n-methylputrescine + s-adenosyl-l-homocysteine + h(+)