| Acetanilides | Compounds based on N-phenylacetamide, that are similar in structure to 2-PHENYLACETAMID... more | 7 | 34 | Details |
| Acetates | Derivatives of ACETIC ACID. Included under this heading are a broad variety of acid for... more | 79 | 285 | Details |
| Acetic Acid Derivatives and Related Substances | Not Available | 17 | 110 | Details |
| Acetylcholine Release Inhibitors | Compounds that block release of the neurotransmitter ACETYLCHOLINE. | 3 | 6 | Details |
| Acid Anhydride Hydrolases | A group of enzymes that catalyze the hydrolysis of diphosphate bonds in compounds such ... more | 1 | 0 | Details |
| Acid Preparations | Not Available | 4 | 121 | Details |
| Acid Reducers | Drugs which actively reduce the hydronium concentration of the gastric system. Includes... more | 18 | 195 | Details |
| Acidic Glycosphingolipids | A subclass of GLYCOSPHINGOLIPIDS containing large polar heads made up of several sugar ... more | 2 | 0 | Details |
| Acidifying Agents | Not Available | 2 | 1 | Details |
| Acids | Chemical compounds which yield hydrogen ions or protons when dissolved in water, whose ... more | 77 | 358 | Details |
| Acids, Acyclic | Carboxylic acids that have open-chain molecular structures as opposed to ring-shaped st... more | 430 | 1236 | Details |
| Acids, Aldehydic | Dicarboxylic acids in which one of the carboxyl groups (-COOH) has been replaced by an ... more | 6 | 15 | Details |
| Acids, Carbocyclic | Carboxylic acids that have a homocyclic ring structure in which all the ring atoms are ... more | 404 | 850 | Details |
| Acids, Noncarboxylic | Inorganic acids with a non metal, other than carbon, attached to hydrogen, or an acid r... more | 73 | 352 | Details |
| Acquired Immunodeficiency Syndrome | Not Available | 1 | 1 | Details |
| Acridines | Compounds that include the structure of acridine. | 9 | 25 | Details |
| Acrylates | Derivatives of acrylic acid (the structural formula CH2=CHCO2H), including its salts an... more | 19 | 22 | Details |
| Actinoid Series Elements | A series of radioactive elements from ACTINIUM, atomic number 89, to and including LAWR... more | 2 | 0 | Details |
| Actinomycin | Not Available | 1 | 8 | Details |
| Actinomycines | Not Available | 1 | 8 | Details |
| Actively Acquired Immunity | Not Available | 94 | 1 | Details |
| Activin Receptors | Receptors for ACTIVINS are membrane protein kinases belonging to the family of PROTEIN-... more | 2 | 0 | Details |
| Acute-Phase Proteins | Proteins that are secreted into the blood in increased or decreased quantities by hepat... more | 4 | 1 | Details |
| Acyclovir and prodrug | Not Available | 2 | 28 | Details |
| Acyltransferases | Enzymes from the transferase class that catalyze the transfer of acyl groups from donor... more | 1 | 0 | Details |