preferred_name: mercaptopurine + S-adenosyl-L-methionine = 6-methylthiopurine + S-adenosyl-L-homocysteine + H(+)
preferred_name_lc: mercaptopurine + s-adenosyl-l-methionine = 6-methylthiopurine + s-adenosyl-l-homocysteine + h(+)
label: mercaptopurine + S-adenosyl-L-methionine = 6-methylthiopurine + S-adenosyl-L-homocysteine + H(+)
label_lc: mercaptopurine + s-adenosyl-l-methionine = 6-methylthiopurine + s-adenosyl-l-homocysteine + h(+)