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| 4-Vinylcatechol <ref name="Doss"></ref><ref name="Yakobson_Michigan"></ref> (Plastic, Bitter, Smokey) || Vinyl phenol || Caffeic Acid || || C<sub>8</sub>H<sub>8</sub>O<sub>2</sub> <ref>[http://pubchem.ncbi.nlm.nih.gov/compound/441226 PubChem. 3-Vinylcatechol. Retrieved 08/18/2015.]</ref> || Production level is difference across species/strains of ''Brettanomyces'' <ref name="Oelofse"></ref>.
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| 4-Ethylphenol <ref name="Doss"></ref><ref name="Yakobson_Michigan"></ref> (Barnyard, Horsey, Spicy, Smoky, Medicinal, Band-Aid <ref>[http://www.aroxa.com/wine/wine-flavour-standard/4-ethyl-phenol/ Aroxa Website. 4-Ethyl Phenol. Retrieved 08/19/2015.]</ref>) || Ethyl phenol || 4-vinylphenol || 0.3 ppm (odor; in beer) <ref name="Maarse">[https://books.google.com/books?id=_OvXjhLUz-oC&pg=PA513&lpg=PA513&dq=4-ethylphenol+odor+threshold&source=bl&ots=fzhA9yvvrJ&sig=K0QykyRqj9TnezG1Mih4gLru1ZE&hl=en&sa=X&ved=0CC4Q6AEwAmoVChMI77DfhNi1xwIV0jqICh1zVgQ8#v=onepage&q=4-ethylphenol%20odor%20threshold&f=false Volatile Compounds in Foods and Beverages. Henk Maarse. CRC Press, Mar 29, 1991. Pg 514, 515.]</ref> || C<sub>8</sub>H<sub>10</sub>O <ref name="pubchem_4EP">[http://pubchem.ncbi.nlm.nih.gov/compound/4-ethylphenol PubChem Website. 4-Ethylphenol. Retrieved 08/19/2015.]</ref> || Also known as 1-Ethyl-4-hydroxybenzene and P-Ethylphenol <ref name="pubchem_4EP"></ref>. Identified as a major product of ''B. bruxellensis'' <ref name="Lucy_2015" />.
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| 4-Ethylguaiacol <ref name="Doss"></ref><ref name="Yakobson_Michigan"></ref> (Smokey, Spicy, Clove <ref>[http://www.aroxa.com/discovery/discovery-standard/4-ethyl-guaiacol Aroxa Website. 4-Ethyl guaiacol. Retrieved 08/19/2015.]</ref>) || Ethyl phenol || 4-vinylguaiacol || 0.13 ppm (odor; in beer) <ref name="Maarse"></ref> || C<sub>9</sub>H<sub>12</sub>O<sub>2</sub> <ref name="pubchem_4EG">[http://pubchem.ncbi.nlm.nih.gov/compound/62465 PubChem Website. 4-Ethyl-2-methoxyphenol. Retrieved 08/19/2015.]</ref> || Also known as 4-Ethyl-2-methoxyphenol <ref name="pubchem_4EG"></ref>. Identified as a major product of ''B. bruxellensis'' <ref name="Lucy_2015" />.