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. 2017 Jun 19;54(8):2361–2371. doi: 10.1007/s13197-017-2676-7

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