| (R) 2,3-Dihydroxy-3-methylvalerate | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| (R)-2,3-Dihydroxy-isovalerate | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| 2-Amino-4-oxo-4-alpha-hydroxy-6-(erythro-1',2',3'-trihydroxypropyl)-5,6,7,8-tetrahydroxypterin | Organic compounds | Organoheterocyclic compounds | Pteridines and derivatives | Pterins and derivatives | Details |
| 2-Amino-4-oxo-6-(1',2',3'-trihydroxypropyl)-diquinoid-7,8-dihydroxypterin | Organic compounds | Organoheterocyclic compounds | Pteridines and derivatives | Pterins and derivatives | Details |
| 2-Carboxymethyl-3-hydroxyphenylpropionyl-CoA | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acyl thioesters | Details |
| 2-Hexaprenyl-3-methyl-5-hydroxy-6-methoxy-1,4-benzoquinol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Polyprenylphenols | Details |
| 2-Hexaprenyl-3-methyl-6-methoxy-1,4-benzoquinol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Polyprenylphenols | Details |
| 2-Hexaprenyl-6-methoxy-1,4-benzoquinol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Polyprenylphenols | Details |
| 2-Isopropyl-3-oxosuccinate | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives | Details |
| 2-Keto-6-acetamidocaproate | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Medium-chain keto acids and derivatives | Details |
| 2-Keto-6-aminocaproate | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Medium-chain keto acids and derivatives | Details |
| 2-O-(6-Phospho-alpha-mannosyl)-D-glycerate | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Details |
| 3,4-Dihydroxybenzylamine | Organic compounds | Benzenoids | Phenols | Benzenediols | Details |
| 3-Dehydrocarnitine | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Short-chain keto acids and derivatives | Details |
| 3-Hydroxypimelyl-CoA | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acyl thioesters | Details |
| 3-Isopropylmalate | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acids and conjugates | Details |
| 3-Methyl-2-butenal | Organic compounds | Organic oxygen compounds | Organooxygen compounds | Carbonyl compounds | Details |
| 3-Oxopimelyl-CoA | Organic compounds | Lipids and lipid-like molecules | Fatty Acyls | Fatty acyl thioesters | Details |
| 4,4-Dimethyl-14alpha-formyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4,4-Dimethyl-14alpha-hydroxymethyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4-(Glutamylamino) butanoate | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| 4-Methoxytyramine | Organic compounds | Benzenoids | Phenols | Methoxyphenols | Details |
| 4alpha-carboxy-4beta-methyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4alpha-carboxy-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Cholestane steroids | Details |
| 4alpha-formyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4alpha-formyl-4beta-methyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4alpha-formyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Cholestane steroids | Details |
| 4alpha-hydroxymethyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4alpha-hydroxymethyl-4beta-methyl-5alpha-cholesta-8-en-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Prenol lipids | Triterpenoids | Details |
| 4Alpha-hydroxymethyl-5alpha-cholesta-8,24-dien-3beta-ol | Organic compounds | Lipids and lipid-like molecules | Steroids and steroid derivatives | Cholestane steroids | Details |
