Endothelium-Dependent Effects of Echinodorus grandiflorus (Cham. & Schltdl.) Micheli Mediated by M3-Muscarinic and B2-Bradykininergic Receptors on Peripheral Vascular Resistance and Its Modulatory Effects on K+ Channels in Mesenteric Vascular Beds

Table 2

Chemical composition of the E. grandiflorus ethanol extract (EEEG) and fractions analyzed by HPLC-DAD.

Compound	Retention time	Concentration (mg/g)
	(min)	EEEG	ButFr	HexFr	ChlFr
Caffeic acid	14.66	45.7 ± 0.1	21.6 ± 0.1
p-coumaric acid	24.68	58.3 ± 0.2	24.3 ± 0.1
Ferulic acid	31.05	59.8 ± 0.1	25.5 ± 0.2
Luteolin	52.68	12.7 ± 0.1

Values are expressed as the mean ± standard deviation. ButFr: butanolic fraction; HexFr: hexane fraction; ChlFr: chloroform fraction; HPLC-DAD: high-performance liquid chromatography with a diode-array detector; : not detected.