erythromycin B + S-adenosyl-L-homocysteine + H(+) => erythromycin D + S-adenosyl-L-methionine
erythromycin b + s-adenosyl-l-homocysteine + h(+) => erythromycin d + s-adenosyl-l-methionine
erythromycin B + S-adenosyl-L-homocysteine + H(+) => erythromycin D + S-adenosyl-L-methionine
erythromycin b + s-adenosyl-l-homocysteine + h(+) => erythromycin d + s-adenosyl-l-methionine