label: vitexin 2''-O-beta-L-rhamnoside + S-adenosyl-L-methionine = 7-O-methylvitexin 2''-O-beta-L-rhamnoside + S-adenosyl-L-homocysteine + H(+)
label_lc: vitexin 2''-o-beta-l-rhamnoside + s-adenosyl-l-methionine = 7-o-methylvitexin 2''-o-beta-l-rhamnoside + s-adenosyl-l-homocysteine + h(+)