erythromycin C + S-adenosyl-L-methionine => erythromycin A + S-adenosyl-L-homocysteine + H(+)
erythromycin c + s-adenosyl-l-methionine => erythromycin a + s-adenosyl-l-homocysteine + h(+)
erythromycin C + S-adenosyl-L-methionine => erythromycin A + S-adenosyl-L-homocysteine + H(+)
erythromycin c + s-adenosyl-l-methionine => erythromycin a + s-adenosyl-l-homocysteine + h(+)