Table 1.

Chemical characterization of bioactive compounds detected in olive byproduct extracts by HPLC-QTOF.

Compound Number	Proposed Compound	RT	m/z	Molecular Formula	MS/MS	O20	O30
1	Gluconic acid	3.8	195	C6H12O7	129	X	X
2	Sucrose	4.98	341	C12H22O11	179	X	X
3	Citric acid	6.49	191	C6H8O7	111	X
4	Vanillin	6.63	151	C8H8O3	-		X
5	Methyl xylobioside	7.19	295	C11H20O9	181, 151, 191	X
6	Methyl gallate glucoside	7.51	563	C14H18O10	277	X
7	Leonuriside	8.14	331	C14H20O9	169, 139	X
8	Methyl xylobioside	8.65	295	C11H20O9	153	X
9	Oleoside Isomer 1	8.88	389	C16H22O11	137, 295	X	X
10	Loganic acid	9.32	375	C16H24O10	315, 213, 209	X	X
11	Oleoside Isomer 2	10.11	389	C16H22O11	183, 121	X	X
12	Aralidioside	10.59	447	C18H24O13	153	X	X
13	Hydroxytyrosol	11.06	153	C8H10O3	123, 135	X	X
14	Taxifolin	11.84	303	C15H12O7	161, 179, 153	X
15	Iridoid glicoside derivative	12.26	553	C22H34O16	181, 411	X
16	Allobetonicoside	12.95	505	C21H30O14	161	X
17	Eriobioside	13.23	567	C23H36O16	181, 223, 161, 341, 403, 505	X
18	Elenolic acid glucoside Isomer 1	13.64	403	C17H24O11	161	X	X
19	Elenolic acid glucoside Isomer 2	14.04	403	C17H24O11	161	X
20	Loganin	15.65	389	C17H26O10	327, 267	X
21	Acetylbarlerin	16.25	489	C21H30O13	145, 163, 327	X	X
22	Oleoside Isomer 3	17.46	389	C16H22O11	345	X	X
23	Benzyl primeveroside	17.98	401	C18H26O10	223	X	X
24	Cinnamoside	18.21	517	C24H38O12	387, 459, 409, 175	X	X
25	Depressine	19.45	687	C25H30O13	525, 161		X
26	Paniculatin	20.06	593	C27H30O15	353, 383, 473, 175		X
27	Kaempferol diglucoside	21.77	609	C27H30O16	447, 285, 197, 153	X	X
28	Phenethyl primeveroside Isomer 1	23.41	415	C19H28O10	151, 175, 223	X
29	Hydroxyoleuropein Isomer 1	23.78	555	C25H32O14	151		X
30	Phenethyl primeveroside Isomer 2	23.87	415	C19H28O10	151, 123	X	X
31	Oleuropein glucoside Isomer 1	25.35	701	C31H42O18	315, 285, 447, 337	X	X
32	Verbascoside	26.1	623	C29H36O15	161, 461	X	X
33	Syringaresinol	26.87	417	C22H26O8	181, 166, 387		X
34	Hydroxyoleuropein Isomer 2	26.93	555	C25H32O14	161, 417, 181	X	X
35	Calceolarioside A	27.2	477	C23H26O11	161		X
36	Kaempferol rutinoside	27.88	593	C27H30O15	285	X	X
37	Luteolin glucoside	28.2	447	C21H20O11	285	X	X
38	Oleuropein glucoside Isomer 2	29.31	701	C31H42O18	609, 300, 539, 269	X	X
39	Methoxyoleuropein	29.74	569	C26H34O14	151, 223, 537, 403, 553	X	X
40	Oleuropein Isomer 1	30.36	539	C25H32O13	307, 275, 149, 377	X	X
41	Luteolin glucoside	31.85	447	C21H20O11	285	X	X
42	Oleuropein Isomer 2	32.38	539	C25H32O13	307, 275, 403, 149, 377	X	X
43	Ligstroside	32.98	523	C25H32O12	291, 259, 361	X	X
44	Oleuropein Isomer 3	33.4	539	C25H32O13	307, 275, 121, 223	X	X
45	Oleuropein Isomer 4	34.45	539	C25H32O13	307, 275, 153, 377	X	X
46	Oleoeuropein aglycone Isomer 1	35.16	377	C19H22O8	307, 149, 275	X	X
47	Oleoeuropein aglycone Isomer 2	35.79	377	C19H22O8	307, 149, 139, 11, 275		X
48	Oleuropein derivative	36.53	763	C36H44O18	539, 307		X
49	Oleoeuropein aglycone Isomer 3	37.07	377	C19H22O8	307, 275		X

MS/MS: tandem mass spectrometry.