Table 5.

Phenolic compound profile of olive seeds

Compound	Rt (min)	Formula	[M–H]− measured (m/z)	Main fragments MS2 [M–H]− (m/z)	Relative abundance (%)
Caffeic acid derivative	6.8	C18H18O9	377.0883	341.1071–191.0582–179.0358	++
Hydroxytyrosol glucoside	11.2	C14H20O8	315.1140	naa	+++
Elenolic acid glucoside	(i) 12.1	C17H24O11	403.1356	223.0633–371.0979	(i) ++++
					(ii) ++++
					(iii) ++++
	(ii) 13.3
	(iii) 13.6
Epigallocatequin	13.2	C15H14O7	305.0782	125.1182	++
Neo-Nüzhenide isomers	(i) 13.8	C31H42O18	701.2298	523.1820–315.1123–403.1233	(i) +++
					(ii) +++
	(ii) 14.2
Verbascoside	14.0	C29H36O15	623.2096	461.1647	++
Nüzhenide isomers	(i) 14.1	C31H42O17	685.2338	523.1830–299.1190	(i) ++++
					(ii) ++++
	(ii) 15.8
Oleuropein aglycon	15.3	C16H26O10	377.1215	195.0666	+++
Methoxynüzhenide	16.6	C32H44O18	715.2455	523.1736–553.1927–329.1241	++
Tyrosol glucoside	18.1	C14H20O7	299.1180	na	+++
Nüzhenide 11-methyloleoside isomers	(i) 18.8	C48H64O27	1071.3551	685.2397–771.2381–523.1873–403.1231	(i) +
					(ii) ++
					(iii) ++
					(iv) +
	(ii) 21.3
	(iii) 23.2
	(iv) 23.7
Apigenin rutinoside	19.2	C27H30O14	577.1579	na	+
Oleuropein	19.8	C25H32O13	539.1851	377.1215–307.0838–275.0949	++++
Ligstroside	21.9	C25H32O12	523.1841	291.0896–361.1304	+++
Demethyloleuropein	23.5	C24H30O13	525.1982	405.13–291.09	++++
Jaspolyanoside	24.1	C42H54O22	909.3192	523.1843–361.1289–291.0881	++
Luteolin	24.3	C15H10O6	285.0402	na	++

Compounds are listed on the basis of increasing retention times (Rt)

Relative abundance (% precursor ion intensity) of the metabolites identified is indicated by + (0–5%), ++ (5–20%), +++ (20–50%) and ++++ (50–100%)

^ana not available