mycinamicin VI + S-adenosyl-L-methionine = mycinamicin III + S-adenosyl-L-homocysteine + H(+)
mycinamicin vi + s-adenosyl-l-methionine = mycinamicin iii + s-adenosyl-l-homocysteine + h(+)
"mycinamicin VI 2''-O-methyltransferase"
"mycinamicin vi 2''-o-methyltransferase"