7'-O-demethylcephaeline + S-adenosyl-L-methionine <=> cephaeline + S-adenosyl-L-homocysteine + H(+)
7'-o-demethylcephaeline + s-adenosyl-l-methionine <=> cephaeline + s-adenosyl-l-homocysteine + h(+)
7'-O-demethylcephaeline + S-adenosyl-L-methionine <=> cephaeline + S-adenosyl-L-homocysteine + H(+)
7'-o-demethylcephaeline + s-adenosyl-l-methionine <=> cephaeline + s-adenosyl-l-homocysteine + h(+)