obsolete 7,8,4'-trihydroxyflavone methyltransferase activity (obsolete GO:0102528)
OBSOLETE. Catalysis of the reaction: S-adenosyl-L-methionine + 7,8,4'-trihydroxyflavone = H+ + S-adenosyl-L-homocysteine + 7,4'-dihydroxy, 8-methoxyflavone.