Main Reaction: caffeoyl alcohol + caffeoyl aldehyde + caffeic acid >> coniferyl alcohol + conifer aldehyde + ferulic acid

Reference: PubMed ID: 21177481
Authors: Louie GV, Bowman ME, Tu Y, Mouradov A, Spangenberg G, Noel JP
Title: Structure-function analyses of a caffeic acid O-methyltransferase from perennial ryegrass reveal the molecular basis for substrate preference.
Published: 2010 Dec

caffeoyl alcohol + caffeoyl aldehyde + caffeic acid --> coniferyl alcohol + conifer aldehyde + ferulic acid