RT (min) Compound (m/z )
(nm)[M − H]− Fragments 7.6 Gallic acid 169 125 272 14.0 Protocatechuic acid 153 109 294, 260 15.7 Dihydroxyphenylethanol 153 280 16.7 trans -caffeoyltartaric acid311 179 330, 298(s) 19.2 2,3-Dihydroxy-1-(4-hydroxy-3-methoxyphenyl)-propan-1-one 211 310, 280 19.5 Methyl gallate 183 169, 125 272 20.5 Tyrosol 137 275 22.3 (epi)gallocatechin-(epi)catechin dimer 593 425 276 22.7 Procyanidin B3 577 425, 289 280 23.0 Procyanidin B1 577 425, 289 280 24.2 trans -coumaroyl-tartaric acid295 163 313 27.3 (+)-catechin 289 279 28.0 Procyanidin T2 865 713, 577, 289 280 28.3 trans -feruryltartaric acid325 193 329, 301(s) 28.7 Hexose ester of vanillic acid 329 167 nd 29.0 Procyanidin T3 865 713, 577, 289 280 29.7 Vanillic acid 167 289, 262 30.5 Procyanidin B4 577 425, 289 283 31.3 trans -caffeic acid179 135 323 33.0 Hexose ester of trans -p -coumaric acid (1) 325 163, 145 311 33.6 Procyanidin B2 577 425, 289 280 34.6 Syringic acid 197 277 37.0 Hexose ester of trans -p -coumaric acid (2) 325 163, 145 312 38.7 (−)-epicatechin 289 279 40.2 Trimeric procyanidin 865 713, 577, 289 280 41.3 Ethyl gallate 197 169, 125 273 42.2 Procyanidin C1 865 713, 577, 289 282 43.2 trans -p -coumaric acid163 119 309 43.5 Trimeric procyanidin 865 713, 577, 289 280 43.8 Procyanidin dimer gallate 729 577 278 44.0 Procyanidin B5 577 425, 289 280 48.5 Myricetin-3-O-glucuronide 493 317 349, 300(s), 261 50.1 Myricetin-3-O-glucoside 479 317 349, 300(s), 261 51.3 Epicatechin-3-O-gallate 441 289, 169 277 53.2 trans -resveratrol-3-O-glucoside389 227 306(s), 319 55.2 Ellagic acid 301 368 57.2 Quercetin-3-O-galactoside 463 301 354, 300(s), 256 57.7 Quercetin-3-O-glucuronide 477 301 354, 300(s), 256 58.2 Astilbin 449 303 288 58.7 Quercetin-3-O-glucoside 463 301 354, 300(s), 256 60.6 Tryptophol 160 279 62.4 Kaempferol-3-O-glucoside 447 285 346, 300(s), 265 67.6 Myricetin 317 371, 300(s), 254 68.9 cis -resveratrol-3-O-glucoside389 227 285 71.9 trans -resveratrol227 306, 319(s) 92.7 Quercetin 301 369, 300(s), 255 95.7 cis -resveratrol227 284