| 1-Methylhistidine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| 1,3-Diaminopropane | Organic compounds | Organic nitrogen compounds | Organonitrogen compounds | Amines | Details |
| 2-Ketobutyric acid | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives | Details |
| 2-Hydroxybutyric acid | Organic compounds | Organic acids and derivatives | Hydroxy acids and derivatives | Alpha hydroxy acids and derivatives | Details |
| 2-Methoxyestrone | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Estrane steroids | Details |
| (R)-3-Hydroxybutyric acid | Organic compounds | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives | Details |
| Deoxyuridine | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleosides | Pyrimidine 2'-deoxyribonucleosides | Details |
| Deoxycytidine | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleosides | Pyrimidine 2'-deoxyribonucleosides | Details |
| Cortexolone | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Hydroxysteroids | Details |
| Deoxycorticosterone | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Hydroxysteroids | Details |
| 4-Pyridoxic acid | Organic compounds | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives | Details |
| Alpha-ketoisovaleric acid | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives | Details |
| p-Hydroxyphenylacetic acid | Organic compounds | Benzenoids | Phenols | 1-hydroxy-2-unsubstituted benzenoids | Details |
| Iodotyrosine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| 3-Methoxytyramine | Organic compounds | Benzenoids | Phenols | Methoxyphenols | Details |
| (S)-3-Hydroxyisobutyric acid | Organic compounds | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives | Details |
| 3-O-Sulfogalactosylceramide (d18:1/24:0) | Organic compounds | Lipids and lipid-like molecules | Sphingolipids | Glycosphingolipids | Details |
| Ureidopropionic acid | Organic compounds | Organic acids and derivatives | Organic carbonic acids and derivatives | Ureas | Details |
| Tetrahydrobiopterin | Organic compounds | Organoheterocyclic compounds | Pteridines and derivatives | Pterins and derivatives | Details |
| Biotin | Organic compounds | Organoheterocyclic compounds | Biotin and derivatives | Not Available | Details |
| Androsterone | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Androstane steroids | Details |
| 7-Dehydrocholesterol | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Cholestane steroids | Details |
| Carnosine | Organic compounds | Organic acids and derivatives | Peptidomimetics | Hybrid peptides | Details |
| Adenine | Organic compounds | Organoheterocyclic compounds | Imidazopyrimidines | Purines and purine derivatives | Details |
| Taurocholic acid | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives | Details |
| Aldosterone | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Hydroxysteroids | Details |
| Dihydrobiopterin | Organic compounds | Organoheterocyclic compounds | Pteridines and derivatives | Pterins and derivatives | Details |
| Butyric acid | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| Acetic acid | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Carboxylic acids | Details |
| Betaine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |