UPLC-DAD-QTOF/MS Analysis of Flavonoids from 12 Varieties of Korean Mulberry Fruit

Table 1

Ten flavonoids isolated from Korean mulberry fruits (Morus alba L.) and their mass spectrometric data.

Aglycones	Glycosides	Acylations	Peak number	Individual flavonols	MW	Fragment ions (m/z)
Kaempferol (m/z 287)	Mono	Mal	8	Kaempferol 3-O-glucoside (astragalin)	448	471, 449, 287
			10	Kaempferol 3-O-(6″-O-malonyl)glucoside	534	557, 535, 287
	Di		7	Kaempferol 3-O-rutinoside (nicotiflorin)	594	617, 595, 449, 287
			3	Kaempferol 3,7-di-O-glucoside	610	633, 611, 449, 287
Quercetin (m/z 303)	Mono	Mal	5	Quercetin 3-O-glucoside (isoquercitrin)	464	487, 465, 303
			6	Quercetin 3-O-(6″-O-malonyl)glucoside	464	573, 551, 465, 303
			9	Quercetin 3-O-(2″-O-malonyl)glucoside (morkotin C)^a	550	573, 551, 303
	Di		4	Quercetin 3-O-rutinoside (rutin)	610	633, 611, 465, 449, 303
			2	Quercetin 3,7-di-O-glucoside	626	649, 627, 465, 303
	Tri		1	Quercetin 3-O-rutinoside-7-O-glucoside (morkotin A)^a	772	795, 773, 627, 611, 465, 303

All samples were analyzed in positive ion mode ([M + H]⁺) using UPLC-DAD-QTOF/MS. ^aNew flavonoid identified in mulberry fruit.