TABLE 7
Mass spectral fragmentation and structures of zoniporide and proposed metabolites
| Structure | [M + H]+ | Fragment Ions | |||||
|---|---|---|---|---|---|---|---|
| Zoniporide |  | 321 | 262 | 234 | 220 | ||
| M1 |  | 337 | 278 | 250 | 236 | ||
| M2 |  | 296 | 278 | 250 | |||
| M3 |  | 280 | 262 | 234 | |||
| M4 |  | 337 | 320 | 278 | 261 | 250 | |
| M5 |  | 353 | 336 | 294 | 277 | 266 | |
| M6 |  | 513 | 337 | 278 | |||
| M7 and M10 |  | 337 | 278 | 250 | |||
| M8 |  | 355 | 296 | 278 | 254 | 250 | 236 |
| M9 |  | 531 | 472 | 355 | 296 | 278 | |