Table 3 Summary of the main compounds in the methanolic crude extracts from O. indicum stems, Z. zerumbet rhizomes, and P. Amarus stems using the LC-QTOF-MS/MS [M − H]–.
Peak no. | Rt (min) | Compounds | Observed precursor ion (m/z) | Fragment (m/z) | Calculated precursor ion (m/z) | |
|---|---|---|---|---|---|---|
O. indicum stems | Â | |||||
1 | 10.97 | Forsythiaside | 623.1940 | 461.1616; 297.0972; 315.1027 | 623.1970 | |
2 | 11.18 | Scutellarin | 461.0720 | 285.0407; 462.0768; 483.0547 | 461.0720 | |
3 | 11.49 | Leucosceptoside A | 637.2115 | 461.1636; 175.3081 | 637.2131 | |
4 | 12.29 | Baicalin | 445.0768 | 891.1605; 269.0407 | 445.0771 | |
5 | 12.81 | Oroxylin A-7-O-β-D-glucuronide | 459.0921 | 283.0615; 268.035; 919.1915 | 459.0927 | |
6 | 12.89 | Chrysin derivative | 429.0833 | 253.0516 | - | |
Z. zerumbet rhizomes | Â | |||||
1 | 12.26 | Kaempferol-3-O-rhamnoside | 431.0981 | 285.0406, 255.0285, 227.0336 | 431.0978 | |
2 | 13.29 | Kaempferol 3-(2″-acetylrhamnosid) or Kaempferol 3-(3″-acetylrhamnosid) | 473.109 | 285.0399, 255.0284, 227.0336 | 473.1084 | |
3 | 14.30 | Kaempferol 3-(2″,4″-diacetylrhamnosid) or Kaempferol 3-(3″,4″-diacetylrhamnosid) | 515.1189 | 285.0371, 255.0287, 227.0340 | 515.1190 | |
4 | 15.82 | Cirsimaritin | 313.0712 | 298.0487, 283.0250, 256.0321 | 313.0712 | |
P. amarus stems | Â | |||||
1 | 9.44 | Brevifolincarboxylic acid | 291.0156 | 247.0257 | 291.0141 | |
2 | 9.81 | Corilagin | 633.0721 | 300.9959, 275.0183 | 633.0728 | |
3 | 10.78 | Methyl brevifolincarboxylate | 305.0311 | 273.0053 | 305.0297 | |
