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Pyrimidine (C 4 H 4 N 2; / p ɪ ˈ r ɪ. m ɪ ˌ d iː n, p aɪ ˈ r ɪ. m ɪ ˌ d iː n /) is an aromatic, heterocyclic, organic compound similar to pyridine (C 5 H 5 N). [3] One of the three diazines (six-membered heterocyclics with two nitrogen atoms in the ring), it has nitrogen atoms at positions 1 and 3 in the ring.
The name may be converted into a Latinised form first, giving -ii and -iae instead. Words that are very similar to their English forms have been omitted. Some of the Greek transliterations given are Ancient Greek, and others are Modern Greek. In the tables, L = Latin, G = Greek, and LG = similar in both languages.
Purine is a heterocyclic aromatic organic compound that consists of two rings (pyrimidine and imidazole) fused together. It is water-soluble. Purine also gives its name to the wider class of molecules, purines, which include substituted purines and their tautomers. They are the most widely occurring nitrogen-containing heterocycles in nature. [1]
Left: The structure of pyrimidine with the locants for ring atoms marked. Right : 5-Fluorouracil , a fluoropyrimidine formally named as 5-fluoro-1 H ,3 H -pyrimidine-2,4-dione Fluoropyrimidines are a general class organic compounds in which the substituent (s) around a pyrimidine ring include at least one fluorine atom.
The study of ancient Greek personal names is a branch of onomastics, the study of names, [1] and more specifically of anthroponomastics, the study of names of persons.There are hundreds of thousands and even millions of individuals whose Greek name are on record; they are thus an important resource for any general study of naming, as well as for the study of ancient Greece itself.
Greek Πλούτων (Ploutōn) is related to the word πλοῦτος (ploutos) meaning "wealth". Americium (Am) 95 America: toponym Named for the Americas, because it was discovered in the United States; by analogy with europium . The name of the continent America itself is derived from the name of the Italian navigator Amerigo Vespucci.
Pyrimidone is the name given to either of two heterocyclic compounds with the formula C 4 H 4 N 2 O: 2-pyrimidone and 4-pyrimidone. The compounds can also be called 2-hydroxypyrimidine or 4-hydroxypyrimidine respectively, based on a substituted pyrimidine , or 1,3- diazine , ring.
RNA is composed of pyrimidine and purine nucleotides, both of which are necessary for reliable information transfer, and thus natural selection and Darwinian evolution. Becker et al. showed how pyrimidine nucleosides can be synthesized from small molecules and ribose , driven solely by wet-dry cycles.