Table 1.
Product ions and representative losses for [4-OH-E1-(un-, 8-13C- and U-15N-labeled)-1-N3Ade + H]+. Number of 15N loss is shown in parenthesis for [4-OH-E1-1-N3(U-15N)Ade + H]+. Relative abundances of dual species with same nominal mass are shown in brackets
| un-(m/z = 420) | 8-13C (m/z = 421) | U-15N (m/z = 425) | Neutral loss from parent |
|---|---|---|---|
| 418 | 419 | 423 (0) | H2 |
| 403 | 404 | 407 (1) | NH3 |
| 402 | 403 | 407 (0) | H2O |
| 401 | 402 | 405 (1) | NH3 + H2 |
| 400 | 401 | 405 (0) | H2O + H2 |
| 392 | 393 | 397 (0) | CO [60%] |
| 391 | 392 | 395 (1) | CH2NH |
| 386 | 387 | 389 (2) | (NH3)2 |
| 385 | 386 | 389 (1) | NH3 + H2O |
| 383 | 384 | 387 (1) | NH3 + H2O + H2 |
| 375 | 376 | 379 (1) | NH3 + CO |
| 373 | 374 | 377 (1) | H2O + CH2NH |
| 368 | 369 | 371 (2) | H2O + (NH3)2 |
| 367 | 368 | 371 (1) | (H2O)2 + NH3 |
| 363 | 364 | 367 (1) | CH2NH + CO |
| 362 | 363 | 365 (2) | (CH2NH)2 [45%] |
| 367 (0) | C3H6O [55%] | ||
| 357 | 358 | 361 (1) | NH3 + H2O + CO [90%] |
| NH3 + H2O + C2H4 [10%] | |||
| 355 | 356 | 359 (1) | CH2NH + (H2O)2 |
| 345 | 346 | 349 (1) | CH2NH + H2O + CO [70%] |
| CH2NH + H2O + C2H4 [30%] | |||
| 339 | 340 | 343 (1) | NH3 + (H2O)2 + CO |
| 327 | 328 | 331 (1) | (H2O)2 + CH2NH + CO [90%] |
| (H2O)2 + CH2NH + C2H4 [10%] | |||
| 310 | 311 | 315 (0) | C7H10O |
| 308 | 309 | 313 (0) | C7H10O + H2 |
| 296 | 297 | 301 (0) | C8H12O |
| 294 | 295 | 299 (0) | C8H14O |
| 282 | 283 | 287 (0) | C9H14O |
| 281 | 282 | 285 (1) | CH2NH + C7H10O |
| 257 | 258 | 262 (0) | C11H15O |
| 256 | 257 | 261 (0) | C11H16O |
| 255 | 256 | 259 (1) | CH2NH + C9H12O |
| 230 | 231 | 234 (1) | CH2NH + C11H13O |
| 229 | 230 | 233 (1) | CH2NH + C11H14O |
| 201 | 202 | 205 (1) | C13H17O2Na |
| 136 | 137 | 141 (0) | catechol estrone quinone a |