Available Neurotransmitter standards
| Name | Precursor Formula | HMDB | KEGG |
| Histamine | C5H9N3 | HMDB0000870 | C00388 |
| Acetylcholine | C7H16NO2 | HMDB0000895 | C01996 |
| Norepinephrine | C8H11NO3 | HMDB0002062 | C00547 |
| Serotonin | C10H12N2O | HMDB0000259 | C00780 |
| Dopamine | C8H11NO2 | HMDB0000073 | C03758 |
| Epinephrine | C9H13NO3 | HMDB0000068 | C00095 |
| Gamma-Aminobutyric acid | C4H9NO2 | HMDB0000112 | C00334 |
| Glutamate | C5H9NO4 | HMDB0000148 | C00025 |