label: 7,8-dimethoxyflavone + S-adenosyl-L-homocysteine + H(+) => 8-hydroxy-7-methoxyflavone + S-adenosyl-L-methionine
label_lc: 7,8-dimethoxyflavone + s-adenosyl-l-homocysteine + h(+) => 8-hydroxy-7-methoxyflavone + s-adenosyl-l-methionine