3'-O-methyltricetin + S-adenosyl-L-methionine => 3',5'-di-O-methyltricetin + S-adenosyl-L-homocysteine + H(+)
3'-o-methyltricetin + s-adenosyl-l-methionine => 3',5'-di-o-methyltricetin + s-adenosyl-l-homocysteine + h(+)
3'-O-methyltricetin + S-adenosyl-L-methionine => 3',5'-di-O-methyltricetin + S-adenosyl-L-homocysteine + H(+)
3'-o-methyltricetin + s-adenosyl-l-methionine => 3',5'-di-o-methyltricetin + s-adenosyl-l-homocysteine + h(+)