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In chemistry, an ester is a compound derived from an acid (organic or inorganic) in which the hydrogen atom (H) of at least one acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (−R). Analogues derived from oxygen replaced by other chalcogens belong to the ester category as well (i.e. esters of acidic − S H, − Se ...
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In the medical field, nitrate-derived organic esters, such as glyceryl trinitrate, isosorbide dinitrate, and isosorbide mononitrate, are used in the prophylaxis and management of acute coronary syndrome, myocardial infarction, acute pulmonary oedema. [10] This class of drug, to which amyl nitrite also belongs, is known as nitrovasodilators.
First, prefixes and suffixes, most of which are derived from ancient Greek or classical Latin, have a droppable vowel, usually -o-. As a general rule, this vowel almost always acts as a joint-stem to connect two consonantal roots (e.g. arthr- + -o- + -logy = arthrology ), but generally, the -o- is dropped when connecting to a vowel-stem (e.g ...
An ester of a carboxylic acid.R stands for any group (typically hydrogen or organyl) and R ′ stands for any organyl group.. In chemistry, an ester is a functional group derived from an acid (organic or inorganic) in which the hydrogen atom (H) of at least one acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (R ′).
Anabolic steroids, also known as anabolic-androgenic steroids (AAS), are a class of drugs that are structurally related to testosterone, the main male sex hormone, and produce effects by binding to the androgen receptor (AR). Anabolic steroids have a number of medical uses, [1] but are also used by athletes to increase muscle size, strength ...
Numbering system. INS numbers consist of three or four digits, optionally followed by an alphabetical suffix to further characterize individual additives. On packaging in the European Union (EU), approved food additives are written with a prefix of E. An additive that appears in the INS does not automatically have a corresponding E number.
Nootropics (/ n oʊ. ə ˈ t r oʊ p ɪ k s / noh-ə-TROHP-iks or / n oʊ. ə ˈ t r ɒ p ɪ k s / noh-ə-TROP-iks; [1] but not / n j uː ˈ t r oʊ p ɪ k s / new-TROHP-iks or / n j uː ˈ t r ɒ p ɪ k s / new-TROP-iks, [1] which are common mispronunciations [citation needed]), colloquially brain supplements, smart drugs and cognitive ...