Caption: Figure 1: A typical HPLC chromatograph showing the standard mixture of phenolic compounds, i.e.,  caffeic acid,  resorcinol,  vanillic acid,  p-coumaric acid,  ferulic acid,  vanillin,  veratric acid
,  myristicin,  coumarin, and cinnamic acid.
In addition, only for the groundwater filtered from wells H4-1, 3 bottles were prepared with 70 mg of either [sup.13]C-labelled veratric acid
(Sigma-Aldrich, USA) or unlabelled ([sup.12]C) veratric acid
The characteristic UV-vis absorption peaks of veratryl alcohol, veratraldehyde, and veratric acid
appear at 277 nm, 308 nm, and 252 nm, respectively (Fig.
Raja, "Veratric acid
, a phenolic acid attenuates blood pressure and oxidative stress in L-NAME induced hypertensive rats," European Journal of Pharmacology, vol.