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]^− (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