Table 2 Contents (mg/100 g dry weight) of isolated 6 flavonoids and their mass spectrometr ic data in the fruits and leaves of jujube tree (Zizyphus jujuba var. inermis (Bunge) Rehder )

Aglycones	Glycosides	Peak No.	Individual flavonoids	MW	Fragment ions (m/z)	Jujube (Fruits-fresh)	Jujube (Fruits-dry)	Jujube (Leaves)
Kaempferol (m/z 287)	Di	5	kaempferol 3-O-rhamnosyl(1→6)galactoside (kaempferol 3-O-robinobioside)	594	617, 595, 449, 287	0.6±0.01)	0.4±0.0	105.2±1.5
		6	kaempferol 3-O-rutinoside (nicotiflorin)	594	617, 595, 449, 433, 287	0.7±0.0	0.4±0.0	215.8±3.1
	Total kaempferol glycoside contents					1.3±0.0	0.8±0.0	321.0±4.5
	Quercetin (m/z 303)	Mono	3	quercetin 3-O-glucoside (isoquercitrin)NFL2)	464	487, 465, 303	0.2±0.0	0.1±0.0	40.4±0.8
Di		1	quercetin 3-O-rhamnosyl(1→6)galactoside (quercetin 3-O-robinobioside)NFL	610	633, 611, 465, 449, 303	5.2±0.1	3.4±0.0	1,054.1±15.7
		2	quercetin 3-O-rutinoside (rutin)	610	633, 611, 465, 449, 303	6.9±0.1	4.9±0.0	6,735.2±84.0
Total quercetin glycoside contents					12.3±0.3	8.4±0.0	7,829.8±99.3
Phloretin (m/z 274)	Di	4	phloretin 3',5'-di-C-glucoside	598	621, 599, 581, 563, 545, 527, 461	ND3)	ND	205.8±4.9
	Total phloretin glycoside contents					ND	ND	205.8±4.9
	Total flavonoid contents						13.6±0.2	9.2±0.0	8,356.5±107.2

All samples analyzed in positive ion mode (m/z, [M+H]⁺) using UPLC-DAD-QTOF/MS.
Each value calculated as means±SD of three replicates using internal standard (galangin).
NFL, new flavonoid in jujube leaves.
ND, Not detected.