label: 7-O-methyldeacetylisoipecoside + S-adenosyl-L-methionine <=> 6,7-O,O-bismethyldeacetylisoipecoside + S-adenosyl-L-homocysteine + H(+)
label_lc: 7-o-methyldeacetylisoipecoside + s-adenosyl-l-methionine <=> 6,7-o,o-bismethyldeacetylisoipecoside + s-adenosyl-l-homocysteine + h(+)