Qualitative and Quantitative Analysis for the Chemical Constituents of Tetrastigma hemsleyanum Diels et Gilg Using Ultra-High Performance Liquid Chromatography/Hybrid Quadrupole-Orbitrap Mass Spectrometry and Preliminary Screening for Anti-Influenza Virus Components

Table 2

Identificati1on analysis of chemical constituents of T. hemsleyanums in positive ion mode of mass spectrometry.

No.	tR (min)	Name	Formula	Detected m/z	Expected m/z	M + X	Error (ppm)	Fragmentor information
37	1.34	Catechins		291.0851	291.0863	M + H	0.0012	123.0438, 161.0591
								179.0696, 249.0744
								273.0750
38	1.69	Epicatechin		291.0845	291.0863	M + H	-0.0018	139.0384, 207.0644
								231.0638, 249.0741
								273.0740
39	1.9	Palmitic acid		257.2466	257.2475	M + H	-0.0009	137.0592, 151.0750
								165.0904, 221.1161
40	3.45	Vitexin-rhamnoside		579.1687	579.1708	M + H	-0.0021	313.0692, 415.1007
								433.1111, 514.5942
41	4.38	Isoquercetin		465.1020	465.1028	M + H	-0.0008	285.0382, 303.0485
								363.7647, 395.0804
42	6.32	Orientin		449.1051	449.1078	M + H	-0.0027	329.3295, 359.1488
43	6.42	Kaempferol-3-O-rutone		595.1646	595.1658	M + H	-0.0012	287.0537, 352.4147
								433.1127, 449.1062
								545.0139
44	7.61	Isoorientin		449.1048	449.1078	M + H	-0.0030	287.0537, 337.0678
								395.1428, 431.1667
45	23.06	Gallocatechin		307.1888	307.0812	M + H	0.1076	163.0748, 261.1832
								271.1683, 285.0766
46	24	Epigallocatechin		307.1886	307.0812	M + H	0.1074	135.0799, 173.0954
								243.1731, 261.1839
								271.1682, 289.1786
47	24.58	Vitexin		433.2325	433.1129	M + H	0.1196	293.1132, 317.2460
								335.2565, 399.2344
48	25.45	Taraxerone		425.3756	425.3778	M + H	-0.0022	217.1945, 283.1677
								339.2303, 365.1367
								406.31027
49	27.26	Isovitexin		433.1131	433.1129	M + H	0.0002	279.23077, 301.90817
								317.24625, 335.25653
								415.2227
50	29.46	Linoleic acid		281.2442	281.2475	M + H	-0.0033	245.2253, 263.2358
51	31.19	Methyl linoleate		293.2097	293.2475	M + H	-0.0378	197.1319, 215.1786
								229.1945, 247.2046
								257.1888, 275.1994