The IUPAC rules permit the use of common names for a number of familiar phenols and aryl ethers. These common names are listed here along with their systematic names. Write the structure of each compound.
(a) Vanillin (4-hydroxy-3-methoxybenzaldehyde): a component of vanilla bean oil, which contributes to its characteristic flavor
(b) Thymol (2-isopropyl-5-methylphenol): obtained from oil of thyme
(c) Carvacrol (5-isopropyl-2-methylphenol): present in oil of thyme and marjoram
(d) Eugenol (4-allyl-2-methoxyphenol): obtained from oil of cloves
(e) Gallic acid (3, 4, 5-trihydroxybenzoic acid): prepared by hydrolysis of tannins derived from plants
(f) Salicyl alcohol (o-hydroxybenzyl alcohol): obtained from bark of poplar and willow trees