| Hydroxypropionic porphyrin III | Organic compounds | Organoheterocyclic compounds | Tetrapyrroles and derivatives | Porphyrins | Details |
| Alpha-Hydroxyisobutyric acid | Organic compounds | Organic acids and derivatives | Hydroxy acids and derivatives | Alpha hydroxy acids and derivatives | Details |
| Isobutyrylglycine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Cysteine-S-sulfate | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Hydroxykynurenine | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds | Details |
| Hyodeoxycholic acid | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Bile acids, alcohols and derivatives | Details |
| Indoleacrylic acid | Organic compounds | Organoheterocyclic compounds | Indoles and derivatives | Indoles | Details |
| Hydroxyphenylacetylglycine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Isobutyryl-L-carnitine | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters | Details |
| Heptacarboxylporphyrin I | Organic compounds | Organoheterocyclic compounds | Tetrapyrroles and derivatives | Porphyrins | Details |
| Indole | Organic compounds | Organoheterocyclic compounds | Indoles and derivatives | Indoles | Details |
| Isodesmosine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Tetracarboxylic acids and derivatives | Details |
| Lactulose | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Details |
| Homocysteine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Hexacarboxylporphyrin I | Organic compounds | Organoheterocyclic compounds | Tetrapyrroles and derivatives | Porphyrins | Details |
| Malic acid | Organic compounds | Organic acids and derivatives | Hydroxy acids and derivatives | Beta hydroxy acids and derivatives | Details |
| Homocarnosine | Organic compounds | Organic acids and derivatives | Peptidomimetics | Hybrid peptides | Details |
| Hydroxyisocaproic acid | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| Isovalerylalanine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| L-3-Phenyllactic acid | Organic compounds | Phenylpropanoids and polyketides | Phenylpropanoic acids | Not Available | Details |
| Mesaconic acid | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| 3-Hydroxymandelic acid | Organic compounds | Benzenoids | Phenols | 1-hydroxy-4-unsubstituted benzenoids | Details |
| L-Threo-2-pentulose | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Details |
| Methylglutaric acid | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| 3-Hexanone | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds | Details |
| 3-Hydroxyisovaleric acid | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| Hydroxyphenyllactic acid | Organic compounds | Phenylpropanoids and polyketides | Phenylpropanoic acids | Not Available | Details |
| L-Hexanoylcarnitine | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acid esters | Details |
| Glycogen | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Details |
| Glycyl-L-leucine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |