Electron impact mass spectra at 70 eV electron energy and chemical ionization mass spectra with ammonia as the reagent gas are reported for certain unsaturated C-glycosides. Comparisons are made between the mass spectra of anomeric pairs of these glycosides.
246 (
5.8). 228 (1.2), 181 (1.5), 156 (0.3). 155 (1.6). 154 (1.6), 130 (3.2). 107 (1.3), 105 (1.2), 95 (1.2), 94 (l.l), 92 (8.5). 91 (100). 86 (3.1), 77 (1.6) 247 (0.8), 246 (4.6). 228 (l.l), 181 (1.2), 159 (1.2), 156 (6.3), 155 (2.0)' 154 (1.4),130 (2.9),129 (1.2),127 (1.9),122 (1.2),115 (1.4)' 1 1 1 (1.5),110 (2.8). 109 (l.l),108 (1.9),107 (3.8)' 106 (3.2),105 (14.1),95 (1.4), 94 (l.O), 92 (9.3). 91 (100). 86 (1.2), 77 (10.0) 441 (0.4). 425 (0.4). 409 (0.8), 395 (1.3), 245 (2.6), 181 (2.3), 153 (1.6), 149 (4.9). 108 (1.9), 108 (1.9), 107 (4.2), 92 (15.5), 91 (100). 77 (4.8) 350 (0.4), 322 (0.4), 321 (2.0), 320 (2.0). 291 (0.2), 245 (2.1), 181 (2.0), 153 (l.l), 149 (21.0), 108 (1.2). 107 (3.1), 92 (8.4), 91 (loo), 77 (5.8) 467 (0.2). 421 (2.8). 406 (3.0), 375 (6.7). 359 (0.9). 329 (1.7), 317 (16.3). 271 (1.6), 269 (l.l), 245 (1.6), 225 (4.4). 218 (2.0). 217 (2.4). 201 (14.7). 160 (25.0), 116 (13.3), 115 (58.8). 107 (17.4), 105 (15.3). 91 (100). 81 (35.5). 77 (20.3) 225 (1.6), 123 (2.1), 1 1 1 (3.9). 107 (3.2). 91 (100). 81 (13.3) 237 (3.5). 195 (4.4), 183 (lO.l), 181 (1.9), 163 (3.3). 152 (l.l), 151 (10.8), 123 (2.1), 121 (1.4), 107 (l.l), 105 (1.2), 92 (8.7), 91 (100). 81 (8.5). 77 (4.0) 274 (26.2). 267 (2.0), 245 (6.6), 239 (4.3). 217 (7.3), 195 (7.2). 187 (13.8). 183 (28.6). 180 (13.6). 167 (2.1), 163 (5.5). 159 (2.6). 155 (5.5). 151 (29.6), 122 (6.6), 107 (4.1), 105 (5.5). 92 (19.4). 91 (100). 81 (18.7), 77 (5.8) 467 (0.2), 421 (O.l), 375 (0.4), 317 (3.5). 316 (0.8). 269 (0.7). 423 (1.5), 391 (0.8), 316 (0.8). 315 (0.4). 275 (1.3), 274 (7.6), 245 (0.5), 423 (2.1), 391 (1.6), 359 (1.7), 316 (2.1), 315 (l.l), 308 (4.2). 275 (5.0).