Table 2. Identified compounds in the HECA with their respective retention times and m/z ratio.

Number	Components	Empirical formula	Chemical class	RT (min.)	MS mode	Calcd.	Obsd.	Error
1	Catechin	C15H14O6	Flavan-3-ol	1.73	[M-H]-	289.0712	289.0706	2.1
2	Epicatechin	C15H14O6	Flavan-3-ol	2.03	[M-H]-	289.0712	289.0741	10.0
3	kaempferol-4-β-glucopyranoside	C21H20O11	Flavonol	2.73	[M+H]+	449.1084	449.1064	4.5
4	Quercetin-3- β-glucopyranoside	C21H20O12	Flavonol	3.48	[M+H]+	465.1033	465.1029	0.9
5	Apigenin-7-O- β-glucopyranoside	C21H20O10	Flavone	3.50	[M+H]+	433.1135	433.1136	0.2
6	Quercetin-3-O-galactopyranoside	C21H20O12	Flavonol	3.62	[M+H]+	465.1033	465.1029	0.9
7	Quercetin-3-O-arabinopyranoside	C20H18O11	Flavonol	4.01	[M+H]+	435.0927	435.0920	1.6
8	Quercetin-3-α-rhamnopyranoside	C21H20O11	Flavonol	4.14	[M+H]+	449.1084	449.1064	4.5
9	Quercetin	C15H10O7	Flavonol	5.51	[M+H]+	303.0505	303.0531	8.6
10	kaempferol-3-O-(6”-O-E-p-coumaroyl)-β-D-glucopyranoside	C30H26O13	Flavonol	5.54	[M+H]+	595.1452	595.1492	6.7
11	kaempferol-3-O-(2”-O-E-p-coumaroyl)-β-D-glucopyranoside	C30H26O13	Flavonol	5.77	[M+H]+	595.1452	595.1492	6.7
12	Kaempferol	C15H10O6	Flavonol	6.49	[M-H]-	285.0399	285.0374	8.8
13	Betulinic acid	C30H48O3	Terpenoid	15.00	[M-H]-	455.3525	455.3487	8.3