preferred_name: erythromycin C + S-adenosyl-L-methionine <=> erythromycin A + S-adenosyl-L-homocysteine + H(+)
preferred_name_lc: erythromycin c + s-adenosyl-l-methionine <=> erythromycin a + s-adenosyl-l-homocysteine + h(+)
label: erythromycin C + S-adenosyl-L-methionine <=> erythromycin A + S-adenosyl-L-homocysteine + H(+)
label_lc: erythromycin c + s-adenosyl-l-methionine <=> erythromycin a + s-adenosyl-l-homocysteine + h(+)