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. 2020 Aug 1;9(8):685. doi: 10.3390/antiox9080685

Table 1.

Classification of phenolic compounds in extra-virgin olive oil (EVOO).

Phenolic Acids
Hydroxybenzoic Acid Derivatives p-Hydroxybenzoic acid (R1 = H; R2 = H)
Protocatechuic acid (R1 = OH; R2 = H)
Vanillic acid (R1 = OCH3; R2 = H)
Syringic acid (R1 = OCH3; R2 = OCH3)
Gallic acid (R1 = OH; R2 = OH)		 graphic file with name antioxidants-09-00685-i001.jpg
Hydroxycinnamic Acid Derivatives p-Coumaric acid (R1 = H; R2 = H)
Ferulic acid (R1 = OCH3; R2 = H)
Caffeic acid (R1 = OH; R2 = H)
Sinapic acid (R1 = OCH3; R2 = OCH3)		 graphic file with name antioxidants-09-00685-i002.jpg
Lignans
(+)-1-Acetoxypinoresinol (R1 = COOCH3; R2 = H; R3 = H)
(+)-1-pinoresinol (R1 = H; R2 = H; R3 = H)		 graphic file with name antioxidants-09-00685-i003.jpg
Flavonoids
Luteolin (R1 = OH; R2 = H; R3 = H)
Apigenin (R1 = H; R2 = H; R3 = H)		 graphic file with name antioxidants-09-00685-i004.jpg
Phenolic Alcohols
Hydroxytyrosol (R1 = OH; R2 = H)
Tyrosol (R1 = H; R2 = H)		 graphic file with name antioxidants-09-00685-i005.jpg
Secoiridoids
Oleuropein aglycone (R1 = OH; R2 = COOCH3; R3 = H)
Ligstroside aglycone (R1 = H; R2 = COOCH3; R3 = H)
Oleacein (R1 = OH; R2 = H; R3 = H)
Oleocanthal (R1 = H; R2 = H; R3 = H)		 graphic file with name antioxidants-09-00685-i006.jpg
Hydroxy-Isocromans
1-phenyl-6,7-dihydroxy-isochroman
1-(39-methoxy-49-hydroxy) phenyl-6,7-dihydroxy-isochroman.