(E)-caffeoyl-CoA + S-adenosyl-L-methionine = (E)-feruloyl-CoA + S-adenosyl-L-homocysteine + H(+)
(e)-caffeoyl-coa + s-adenosyl-l-methionine = (e)-feruloyl-coa + s-adenosyl-l-homocysteine + h(+)
"caffeoyl-CoA O-methyltransferase"
"caffeoyl-coa o-methyltransferase"