Main Reaction: cinnamic acid >> P-coumaric acid

Reference: PubMed ID: 21143672
Authors: Weng JK, Mo H, Chapple C
Title: Over-expression of F5H in COMT-deficient Arabidopsis leads to enrichment of an unusual lignin and disruption of pollen wall formation.
Published: 2010 Dec

cinnamic acid --> P-coumaric acid