Main Reaction: Cinnamic acid >> 4-Coumaric acid

Reference: PubMed ID: 21504162
Authors: Sung PH, Huang FC, Do YY, Huang PL
Title: Functional expression of geraniol 10-hydroxylase reveals its dual function in the biosynthesis of terpenoid and phenylpropanoid.
Published: 2011 May 11

Cinnamic acid --> 4-Coumaric acid