Table 1.
Identification of the ingredients in EEJ by UPLC-DAD/Q-TOF-MS.
| Number | t R (min) | Positive ion | Negative ion | UV (λmax) | Identification | Exact mass |
|---|---|---|---|---|---|---|
| [M + H]+ (MS/MS) | [M − H]− (MS/MS) | |||||
| 1 | 1.44 | 284.0995 (152) | 282.0846 (150) | 205; 258 | Guanosine | 283.0917 |
| 2 | 2.23 | 166.0829 (149; 120) | 164.0661 (147) | 205; 258 | Phenylalanine | 165.0790 |
| 3 | 3.17 | 357.1244 (193) | 355.1105 (191) | 230; 321 | trans -p-Feruloyl-β-D-glucopyranoside | 356.1107 |
| 4 | 3.63 | 205.0961 (188; 132) | 203.0784 (159; 130) | 219; 278 | Tryptophan | 204.0899 |
| 5 | 6.17 | 403.1629 (271) | 401.1412 (269; 161) | 203; 255 | Benzyl 6-O-(β-D-xylopyranosyl)-β-D-glucopyranoside | 402.1526 |
| 6 | 7.45 | 757.2231 (611; 465; 303) | 755.2079 (301; 300) | 254; 353 | Quercetin-3-O-(2,6-α-L-dirhamnopyranosyl-β-D-glucopyranoside) | 756.2113 |
| 7 | 8.16 | 741.2261 (595; 449; 287) | 739.2090 (575; 285; 284) | 230; 347 | Kaempferol-3-O-(2,6-α-L-dirhamnopyranosyl-β-D-glucopyranoside) | 740.2164 |
| 8 | 8.37 | 611.1608 (465; 303) | 609.1449 (301; 300) | 255; 353 | Rutin | 610.1534 |
| 9 | 8.57 | 611.1613 (465; 303) | 609.1456 (301; 300) | 255; 352 | Quercetin-3-O-neohesperidoside | 610.1534 |
| 10 | 8.87 | 591.2371 (429; 411) | 589.2212 (427) | 249; 339 | trans-p-Ferulylalcohol-4-O-(2-glucopyranosyl-6-(2-methyl-3-hydroxypropionyl)) glucopyranoside | 590.2211 |
| 11 | 9.19 | 595.1647 (449; 287) | 593.1499 (427; 285) | 230; 348 | Kaempferol-3-O-β-rutinoside | 594.1585 |
| 12 | 9.52 | 449.1030 (287) | 447.0866 (285) | 230; 348 | Kaempferol-3-O-β-D-glucopyranoside | 448.1006 |
| 13 | 12.21 | 977.3852 (797; 617; 393) | 975.3782 (813; 589) | 191; 237 | Molihuaside E | 976.3788 |
| 14 | 12.35 | 977.3931 (797; 617; 393) | 975.3814 (813; 589) | 191; 237 | Molihuaside A | 976.3788 |
| 15 | 12.93 | 977.3994 (797; 617; 393) | 975.3796 (813; 589) | 191; 237 | Molihuaside D | 976.3788 |
| 16 | 13.03 | 977.3879 (797; 617; 393) | 975.3778 (813; 589) | 191; 237 | Molihuaside C | 976.3788 |
| 17 | 13.42 | 1363.5467 (1183; 1003; 823; 375) | 1361.5055 (1199; 813) | 191; 237 | Molihuaside B | 1362.5000 |
| 18 | 14.08 | 1363.5112 (1183; 1003; 823; 375) | 1361.5082 (1199; 813) | 191; 237 | Sambacoside E | 1362.5000 |
| 19 | 14.23 | 1363.5226 (1183; 1003; 823; 375) | 1361.5073 (1199; 813) | 191; 237 | Sambacoside A | 1362.5000 |
| 20 | 14.55 | 1363.5189 (1183; 1003; 823; 375) | 1361.5036 (1199; 813) | 191; 237 | Sambacoside F | 1362.5000 |