Table 2.

Compounds’ name, molecular weight, maximum UV absorption, and molecular formula of the identified compounds

Peak no.	Compounds name	[M − H]−	[M − H]+ [M + X]	UV (nm)	Molecular formula
1	Sugar	181	204 (M + Na)	–	C6H12O6
2	Quinic acid	191	193	218, 221, 322	C7H12O6
3	Gluconic acid	195	221 (M + Na + 2H)	218, 280, 322	C6H12O7
4	4-Syringin	317	–	215, 279, 322	C17H24O9
5	Hydroxyferulic acid hexoside	371	206 (M/2 + H + K)	217, 223, 322	–
6	Secologanoside	389	391	207, 211, 260	C16H22O11
7	Unknown	343	345	–	C18H16O7
8	Hirsutidin 3-O-glucoside	505	–	–
9	7-Epiloganin	389	391	260	C17H26O10
10	Oleuropeinaglycone derivative	377	379	–	–
11	Oleoside methyl ester	403	427 (M + Na)	202, 270, 317	C17H24O11
12	10-Elenolic acid glucoside	403	427 (M + Na)	217, 279	C17H24O11
13	Unknown	525	527	202, 281	–
14	2-(2-ethyl-3-hydroxy-6-propionylcyclohexyl)Ac Ac glucoside	403	427 (M + Na)	202, 279, 317	C17H24O11
15	2′′-Methoxyoleuropein isomer 1	569	589 (M + NH4 + H)	221, 322, 366	C26H34O13
16	Elenolic acid derivative	601	620 (M + NH4 + H), 647 (M + 2Na − H)	202, 279, 322
17	Oleuropein diglucoside (isomer 1)	701	725 (M + Na)	202, 280, 317	C31H42O18
18	Hydroxyoleuropein	555	–	204, 279	C25H33O14
19	Oleuropein diglucoside (isomer 2)	701	725 (M + Na), 741 (M + K)	222, 276, 322	C31H42O18
20	Luteolin-7-glucoside	447	449	222, 346	C21H20O11
21	Apigenin rutinoside	577	579	244, 279, 322	C27H30O14
22	Oleuropein diglucoside (isomer 3)	701	725 (M + Na)	227, 279, 322	C31H42O18
23	Oleuropein	539	541, 563 (M + Na) 579 (M + K)	244, 279, 322	C25H32O13
24	Lucidumoside C	583	625 (M + K)	231, 280	C27H36O14
25	Oleuropein isomer	539	563 (M + Na)	227, 279	C25H32O13
26	Ligstroside	523	547 (M + Na)	227, 276	C25H32O12
27	Luteolin	285	287	268	C15H10O6
28	Quercetin	301	303	256, 273	C15H10O7
29	Diosmetin	299	301	–	C16H12O6
30	Unknown	343	389 (M + 2Na − H)	–	C18H17O7