label: 3,3',4',5,7-pentahydroxy-8-methoxyflavone + S-adenosyl-L-homocysteine + H(+) => 3,3',4',5,7,8-hexahydroxyflavone + S-adenosyl-L-methionine
label_lc: 3,3',4',5,7-pentahydroxy-8-methoxyflavone + s-adenosyl-l-homocysteine + h(+) => 3,3',4',5,7,8-hexahydroxyflavone + s-adenosyl-l-methionine