Table 1.
Compounds identified in RR extract.
| Peak no. | Retention time (min) | [M–H]− | [M+HCOO]− | (–) ESI-MS (m/z) Main fragment ions | Formula | Identification |
|---|---|---|---|---|---|---|
| 1 | 13.04 | 361.1158 | 407.1190 | 361.1139; 199.0627; 169.0500; 384.9359; 248.9609; 154.9788 |
C15H22O10 | Catalpol |
| 2 | 14.56 | 397.0922 | 443.0969 | 365.1044; 316.9483; 297.1224 | C15H23ClO10 | Glutinoside |
| 3 | 23.50 | 397.0943 | 443.0945 | 341.1098; 316.9469; 226.9778; 112.9907 | C28H14O3 | 2-(Dibenzo[ghi,mno]fluoranthen-1-ylcarbonyl) benzoic acid |
| 4 | 27.99 | 361.1171 | 326.1234; 316.9459; 112.9856 | C15H22O10 | Danmelittoside | |
| 5 | 31.37 | 685.2181 | 731.2267 | 384.92297; 248.9549; 263.0779; 341.1154; 248.9606; 505.1471; 685.2161 |
C27H42O20 | Rehmannioside D |
| 6 | 31.69 | 435.2243 | 389.1928 | 319.0780; 183.1034; 215.0819; 112.9959 | C20H36O10 | Rehmaionoside A/Rehmaionoside B |
| 7 | 33.70 | 523.1702 | 569.1709 | 523.1702; 463.1343 | C21H32O15 | Melittoside |
| 8 | 35.22 | 345.1554 | 367.1360; 265.1019; 165.0924; 248.9601; 154.9789 |
C16H26O8 | Rehmapicroside | |
| 9 | 38.68 | 347.1311 | 393.1404 | 347.1351; 167.0743; 149.0667; 248.9611; 154.9769; 248.9596; 154.9770; 329.1333 |
C15H24O9 | Leonuride or isomer |
| 10 | 40.60 | 373.1148 | 318.7710; 316.9545; 248.9636; 113.0061 | C16H22O10 | Geniposidic acid | |
| 11 | 43.63 | 461.1664 | 315.1091; 397.1125; 204.963; 154.9775 | C20H30O12 | Decaffeoyl-verbascoside | |
| 12 | 53.55 | 375.1295 | 213.0715; 169.0923; 103.9678; 131.7047; 191.0681 |
C16H24O10 | 8-Epiloganic acid | |
| 13 | 58.85 | 451.2147 | 391.0532; 293.0553; 277.0559; 226.9850; 129.1799 |
C27H32O6 | 28-Deoxonimbolide | |
| 14 | 61.54 | 785.2529 | 623.2172; 461.1685; 315.1005; 477.1517; 703.1626; 541.1231 |
C35H46O20 | Purpureaside C/Echinacoside | |
| 15 | 64.11 | 389.2192 | 435.2237 | 389.2192; 161.0542; 179.0726; 248.9595; 154.9754; 316.9467; 248.9457 |
C20H36O10 | Rehmaionoside A/Rehmaionoside B |
| 16 | 64.78 | 799.2666 | 623.2188; 461.1619; 248.9573; 703.1678; 557.0945; 384.9435; 384.9355 |
C36H48O20 | Cistanoside A/Jionoside A1/Jionoside A2 | |
| 17 | 67.75 | 623.1975 | 461.1660; 384.9374; 315.1066; 315.1115; 248.9595; 154.9775 |
C29H36O15 | Acteoside | |
| 18 | 68.12 | 813.2823 | 637.2318; 623.2012; 461.1617; 659.2773; 513.2349 |
C37H50O20 | Jionoside B1/Jionoside B2 | |
| 19 | 69.21 | 623.1973 | 461.1660; 384.9380; 315.1153 | C29H36O15 | Isoacteoside/Forsythoside A | |
| 20 | 70.89 | 637.2136 | 461.1669; 452.9183; 248.9533; 316.9483 | C30H38O15 | Jionoside D/Leucosceptoside A/Leucosceptoside | |
| 21 | 72.29 | 523.1822 | 452.9175; 316.9470; 248.9533; 193.0507; 162.0315; 154.9770 |
C25H32O12 | 6-O-E-Feruloylajugol | |
| 22 | 74.25 | 651.2309 | 457.1848; 384.9551; 520.9061; 383.9357; 248.9616; 313.1651; 237.1449 |
C31H40O15 | Martynoside/Martynoside isomer | |
| 23 | 78.48 | 535.2542 | 452.9211; 349.1507; 238.7846; 248.9545; 112.9959 |
C28H40O10 | Strophanthidin arabinoside | |
| 24 | 77.89 | 329.2324 | 313.1670; 267.1626; 211.1375; 171.0987 | C18H34O5 | Octadecenoic acid |