guaiacol

Guaiacol (2-Methoxyphenol) is a precursor to various flavorants, such as eugenol and vanillin. Its derivatives are used medicinally as an expectorant, antiseptic, and local anesthetic. It also can be used as an indicator in chemical reactions that produce oxygen. When oxygen binds to it, the complex turns yellowish brown and absorbs light maximally at about 470 nm.

Guaifenesin (Guaiphenesin) is an expectorant that also has some muscle relaxing action. It is used in many cough preparations.

Vanillyl Alcohol (3-Methoxy-4-hydroxybenzyl alcohol) possesses anti-angiogenic, anticonvulsive, anti-inflammatory, anti-oxidant, neuroprotective, and anti-nociceptive activities. Vanillyl alcohol can effectively inhibit the cytotoxicity and improved cell viability in 1-methyl-4-phenylpyridinium (MPP+)-induced MN9D dopaminergic cells, it also can attenuate the elevation of reactive oxygen species (ROS) levels, decrease in the Bax Bcl-2 ratio and poly (ADP-ribose) polymerase proteolysis.