Table 1.

Characterization of compounds in the fraction of burdock leaf using ultra-performance liquid chromatography (UPLC) with photo-diode array and electrospray ionization mass spectrometry detection.

Peak	tR	M	[M − H]−	Fragment Ions	λmax	Identification
Peak 1	7.62	354	353	191	326	chlorogenic acid
Peak 2	8.25	180	179	135	324	caffeic acid
Peak 3	10.90	164	163	119	303	p-coumaric acid
Peak 4	12.04	122	121	105	222	benzoic acid
Peak 5	12.22	610	609	610	256	rutin
Peak 6	13.67	977	976	487	442	crocin
Peak 7	13.51	516	515	191	295	cynarin
Peak 8	14.82	302	301	151	256,368	quercetin
Peak 9	15.75	286	285	571	210,349	luteolin
Peak 10	16.22	814	813	315	251	Tenacissoside I
Peak 11	21.07	456	455	219	210	ursolic acid