Research Article
Methanolic Extract of Clinacanthus nutans Exerts Antinociceptive Activity via the Opioid/Nitric Oxide-Mediated, but cGMP-Independent, Pathways
Table 1
Phenolic compounds tentatively identified in C. nutans extract.
| Peak number | (min) | [M-H]ā (m/z) | Error (ppm) | Molecule formula | Proposed compound |
| 1 | 0.63 | 169.01270 | | C7H5O5 | Gallic acid | 2 | 1.22 | 137.02347 | | C7H5O3 | 4-Hydroxybenzoic acid | 3 | 1.51 | 179.03314 | | C9H7O4 | Caffeic acid | 4 | 2.55 | 163.0387 | | C9H7O3 | Coumaric acid | 5 | 3.06 | 563.13776 | | C26H27O14 | Schaftoside | 6 | 3.51 | 193.04881 | | C10H9O4 | Ferulic acid | 7 | 4.04 | 431.09622 | | C21H19O10 | Vitexin | 8 | 4.52 | 447.09158 | | C21H19O11 | Orientin | 9 | 5.11 | 623.19568 | | C29H35O15 | Forsythoside H | 10 | 5.37 | 447.09152 | | C21H19O11 | Isoorientin | 11 | 5.50 | 623.19604 | | C29H35O15 | Forsythoside I | 12 | 5.55 | 431.09644 | | C21H19O10 | Isovitexin | 13 | 5.70 | 503.11783 | | C24H24O12 | Diosmetin glycoside | 14 | 6.85 | 285.03860 | | C15H9O6 | Luteolin | 15 | 7.66 | 269.04404 | | C15H9O5 | Apigenin |
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