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