cephaeline + S-adenosyl-L-methionine = emetine + S-adenosyl-L-homocysteine + H(+)
cephaeline + s-adenosyl-l-methionine = emetine + s-adenosyl-l-homocysteine + h(+)
"cephaeline 6'-O-methyltransferase"
"cephaeline 6'-o-methyltransferase"