label: 4',8-dihydroxy-7-methoxyflavone + S-adenosyl-L-homocysteine => 4',7,8-trihydroxyflavone + S-adenosyl-L-methionine
label_lc: 4',8-dihydroxy-7-methoxyflavone + s-adenosyl-l-homocysteine => 4',7,8-trihydroxyflavone + s-adenosyl-l-methionine