Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Identification of MEL (melatonin), TEE (tryptophan ethyl ester), and MISs (MEL isomers) by HUPLC/ESI-QTRAP.
| Compound | Exact Mass | MS/MS Fragmentation | |
|---|---|---|---|
| [M + H]+ | MS/MS Fragments | Collision Energy (µV) | |
| MEL | 233.1 | 188.1 | 30 |
| 216.1 | 30 | ||
| 174.1 | 30 | ||
| TEE | 233.1 | 174.1 | 20 |
| 159.0 | 36 | ||
| 130.1 | 55 | ||
| 178.1 | 29 | ||
| MIS 1 | 233.1 | 141.0 | 20 |
| 216.0 | 20 | ||
| 174.1 | 20 | ||
| MIS 2 | 233.1 | 141.1 | 20 |
| 196.0 | 20 | ||
| MIS 3 | 233.1 | 130.0 | 50 |
| MIS 4 | 233.1 | 141.0 | 20 |
| 216.0 | 20 | ||
| 174.1 | 20 | ||
| MIS 5 | 233.1 | 141.0 | 35 |
| 159.0 | 35 | ||
