Table 1.

LC-PDA-ESI/MS/MS identification of the major constituents of B. hookeri.

N	t R  (min)	UV maximum (nm)	(M–H)−  m/z	Fragments (MS/MS) m/z	Tentative structural assignment
1	4.7	222, 271	169.01	125.02	Gallic acid
2	13.0	220, 225 (sh), 280, 320	311.04	179.04, 149.01, 135.05	Caffeic acid pentose ester
3	14.1	218, 230 (sh), 280, 325	311.04	179.04, 149.01, 135.05	Caffeic acid pentose ester
4	15.1	205, 225 (sh), 280	577.14	425.09, 407.08, 289.07, 245.08, 125.03	Procyanidin dimer (epi/catechin dimer)
5	16.4	205, 230 (sh), 280 (sh), 315 (sh)	295.05	163.04, 149.01, 119.05	Coumaric acid pentose ester
6	17.4	205, 225 (sh), 280	865.21	407.08, 289.07, 125.03	Procyanidin trimer (epi/catechin trimer)
7	17.7	220, 280	729.16	407.08, 289.07, 245.08, 169.02, 125.03	Procyanidin dimer gallate
8	18.2	200, 260, 355	615.11	463.09, 301.04, 300.03, 271.03, 255.03, 179.00, 151.01, 169.02, 125.03	Quercetin 3-O-hexoside gallate
9	18.5	210, 250, 356	609.16	301.04, 300.03, 271.02, 255.03, 179.00, 151.01	Rutin: Quercetin 3-O-rhamnosyl (1→6) hexoside
10	19.4	210, 278	441.09	289.07, 245.08, 169.02, 125.03	Epicatechin gallate
11	19.6	200, 260, 355	463.09	301.04, 300.03, 271.02, 255.03, 179.00, 151.00	Quercetin 3-O-hexoside
12	21.1	200, 265, 345	599.11	447.10, 285.04, 284.03, 255.03, 227.04, 169.02, 125.03	Kaempferol 3-O-galloyl hexoside
13	22.0	200, 265, 345	447.10	285.04, 284.03, 255.03, 227.04	Kaempferol 3-O-hexoside
14	28.4	220, 290 (sh), 318	441.09	295.05, 277.04, 163.04, 145.03, 119.05	Dicoumaroyl pentose
15	29.0	220, 290 (sh), 315	441.09	295.05, 277.04, 163.04, 145.03, 119.05	Dicoumaroyl pentose