label: a 3'-methoxyflavone + S-adenosyl-L-homocysteine + H(+) => a 3'-hydroxyflavone + S-adenosyl-L-methionine
label_lc: a 3'-methoxyflavone + s-adenosyl-l-homocysteine + h(+) => a 3'-hydroxyflavone + s-adenosyl-l-methionine