pyran

enUK

py·ran

P0685150 (pī′răn′)n. Either of two isomeric unsaturated compounds with the formula C₅H₆O, having a ring of five carbon atoms and one oxygen atom.

[pyrone, heterocyclic compound (pyr(o)- + -one) + -an.]

pyran

(ˈpaɪræn; paɪˈræn) n (Elements & Compounds) an unsaturated heterocyclic compound having a ring containing five carbon atoms and one oxygen atom and two double bonds. It has two isomers depending on the position of the saturated carbon atom relative to the oxygen[C20: from pyro- + -an]

py•ran

(ˈpaɪ ræn, paɪˈræn)

n. either of two compounds having the formula C₅H₆O, containing one oxygen and five carbon atoms arranged in a six-membered ring. [1900–05; pyr(one) a heterocyclic ketone (< Greek pŷr fire + -one) + -an²]

单词	pyran
释义	pyran enUK py·ran P0685150 (pī′răn′)n. Either of two isomeric unsaturated compounds with the formula C₅H₆O, having a ring of five carbon atoms and one oxygen atom. [pyrone, heterocyclic compound (pyr(o)- + -one) + -an.] pyran (ˈpaɪræn; paɪˈræn) n (Elements & Compounds) an unsaturated heterocyclic compound having a ring containing five carbon atoms and one oxygen atom and two double bonds. It has two isomers depending on the position of the saturated carbon atom relative to the oxygen[C20: from pyro- + -an] py•ran (ˈpaɪ ræn, paɪˈræn) n. either of two compounds having the formula C₅H₆O, containing one oxygen and five carbon atoms arranged in a six-membered ring. [1900–05; pyr(one) a heterocyclic ketone (< Greek pŷr fire + -one) + -an²] EncyclopediaSeePyrans pyran enUK pyran [pi´ran] a cyclic compound in which the ring consists of 5 carbon atoms and 1 oxygen atom. py·ran (pī'ran), A cyclic compound that may be considered the formal parent of sugars with an oxygen bridge from carbon atoms 1-5 (the pyranoses).
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