Table I.

Identification of Flavonoids in R. idaeus Leaves by HPLC–ESI–QTOF–MS-MS in Negative Ion Mode

No.	tR min	Formula	[M–H]−	Error, ppm	CE, eV	ESI–MS2 data	Identification
1	22.84	C21H20O12	463.0871	−2.38	30 70	343 (2), 301 (61), 300 (100) 271 (100), 255 (58), 179 (7), 151 (12)	Quercetin-3-O-glucoside
2	23.24	C21H18O13	477.0679	0.44	30 70	343 (3), 301 (100), 300 (24) 271 (79), 255 (33), 179 (32), 151 (100)	Quercetin-7-O-glucuronic acid
3	23.61	C27H30O16	609.1473	1.96	30 70	447 (2), 285 (44), 284 (100) 255 (100), 227 (14)	Kaempferol-3-O-glucose-glucose
4	23.82	C27H30O16	609.1435	−4.28	30 70	505 (5), 463 (8), 343 (3), 301 (64), 300 (100) 271 (100), 255 (62), 179 (6), 151 (10)	Quercetin-3-O-hexose-deoxyhexose
5	24.05	C28H32O16	623.1592	−2.56	30 70	315 (42), 314 (100) 300 (100), 271 (81), 255 (4), 227 (2)	Isorhamnetin-3-O-rutinoside
6	24.13	C21H20O11	447.0942	2.05	30 70	315 (100), 314 (57), 300 (2) 300 (100), 271 (8), 255 (3)	Isorhamnetin-7-O-pentose
7	24.86	C21H20O11	447.0921	−2.65	30 70	285 (100), 284 (55) 175 (9), 151 (100), 133 (31)	Luteolin-7-O-glucoside
8	25.21	C21H18O12	461.0734	1.84	30 70	285 (50), 284 (100) 255 (100), 227 (8)	Kaempferol-3-O-glucuronic acid
9	25.29	C21H18O12	461.0730	0.98	30 70	327 (5), 285 (100), 284 (70) 255 (100), 227 (6)	Kaempferol-7-O-glucuronic acid
10	25.56	C21H18O12	461.0741	3.36	30 70	285 (100) 255 (100), 227 (8)	Kaempferol-4′-O-glucuronic acid
11	25.99	C20H18O10	417.0843	3.79	30 70	285 (44), 284 (100) 255 (100), 227 (9)	Kaempferol-3-O-pentose
12	26.49	C20H18O10	417.0823	−1.01	30 70	285 (45), 284 (100) 255 (100), 227 (10)	Kaempferol-3-O-pentose
13	31.64	C27H30O15	593.1518	1.02	30 70	447 (6), 285 (42), 284 (100) 255 (100), 227 (12)	Kaempferol-3-O-hexose-deoxyhexose
14	39.42	C15H10O7	301.0344	−3.24	30 70	301 (100) 271 (100), 255 (51), 179 (6), 151 (18)	Quercetin
15	40.83	C15H10O6	285.0411	2.24	30 70	285 (100) 175 (13), 151 (100), 133 (22)	Luteolin
16	42.05	C15H10O6	285.0399	−1.97	30 70	285 (100) 255 (100), 227 (5)	Kaempferol