. "\"Catalysis of the reaction: S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate = S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate.\" [EC:2.1.1.68, MetaCyc:CAFFEATE-O-METHYLTRANSFERASE-RXN]" . . "caffeate O-methyltransferase activity" . "caffeate 3-O-methyltransferase activity" . "caffeate methyltransferase activity" . "S-adenosyl-L-methionine:3,4-dihydroxy-trans-cinnamate 3-O-methyltransferase activity" . "S-adenosyl-L-methionine:caffeic acid-O-methyltransferase activity" . "EC:2.1.1.68" . "MetaCyc:RXN-1104" . "RHEA:20228" . .