preferred_name: a cytidine in mRNA + S-adenosyl-L-methionine => a 5-methylcytidine in mRNA + S-adenosyl-L-homocysteine + H(+)
preferred_name_lc: a cytidine in mrna + s-adenosyl-l-methionine => a 5-methylcytidine in mrna + s-adenosyl-l-homocysteine + h(+)
label: a cytidine in mRNA + S-adenosyl-L-methionine => a 5-methylcytidine in mRNA + S-adenosyl-L-homocysteine + H(+)
label_lc: a cytidine in mrna + s-adenosyl-l-methionine => a 5-methylcytidine in mrna + s-adenosyl-l-homocysteine + h(+)