Simplified phenolic compound biosynthesis pathway. DHQD, 3-dehydroquinate dehydratase; QD, quinate dehydrogenase; SD, shikimate dehydrogenase; EPSP, 3-phosphoshikimate 1-carboxyvinyltransferase; SK, shikimate kinase; CS, chorismate synthase; CM, chorismate mutase; ICS, isochorismate synthase; IPL, isochorismate pyruvate lyase; PAL, phenylalanine ammonia lyase; C4H, cinnamic acid 4-hydroxylase; 4CL, 4-coumarate-CoA ligase; CNL, cinnamate-CoA ligase; βk, β-ketothiolase; TE, thioesterase; BALD, benzaldehyde dehydrogenase; BBT, benzyl alcohol O-benzoyltransferase; BA2H, benzoic acid 2-hydroxylase; BSMT, benzoic acid/salicylic acid methyltransferase; COMT, caffeic acid 3-O-methyltransferase; VS, vanillin synthase; VD, vanillin dehydrogenase; HCT, hydroxycinnamoyl-CoA:quinate/shikimate hydroxycinnamoyl transferase; CSE, caffeoyl shikimate esterase; C3H, 4-coumarate 3-hydroxylase; CCoAOMT, caffeoyl-CoA O-methyltransferase; F5H, ferulate 5-hydroxylase; CCR, cinnamoyl-CoA reductase; CAD, cinnamyl-alcohol dehydrogenase; LiP, lignin peroxidase; CHS, chalcone synthase; CHI, chalcone isomerase; F3H, flavanone 3-dioxygenase; FNS, flavone synthase; F3′H, flavonoid-3′-hydroxylase; F3′5′H, flavonoid 3′,5′-hydroxylase; DFR, dihydroflavonol reductase; LAR, leucoanthocyanidin reductase; LDOX, eucoanthocyanidin dioxygenase; ANR, anthocyanidin reductase; UGT, UDP-glucuronosyltransferase.