Main Reaction: cinnamic acid >> ρ-coumaric acid

Reference: PubMed ID: 15563622
Authors: Morreel K, Ralph J, Lu F, Goeminne G, Busson R, Herdewijn P, Goeman JL, Van der Eycken J, Boerjan W, Messens E
Title: Phenolic profiling of caffeic acid O-methyltransferase-deficient poplar reveals novel benzodioxane oligolignols.
Published: 2004 Dec

cinnamic acid --> ρ-coumaric acid