pyrrole

(redirected from Pyrrhole)
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pyr·role

 (pîr′ōl′)
n.
1. A five-membered heterocyclic ring compound, C4H5N, having an odor similar to chloroform, that is the parent compound of protoporphyrin.
2. Any of various derivatives of this compound.

[Greek purros, red (from pūr, fire; see pyre) + -ole.]

pyr·ro′lic (pĭ-rō′lĭk) adj.

pyrrole

(ˈpɪrəʊl; pɪˈrəʊl)
n
(Elements & Compounds) a colourless insoluble toxic liquid having a five-membered ring containing one nitrogen atom, found in many naturally occurring compounds, such as chlorophyll. Formula: C4H5N. Also called: azole
[C19: from Greek purrhos red, from pur fire +-ole1]
pyrrolic adj

pyr•role

(pɪˈroʊl, ˈpɪr oʊl)

n.
a colorless, toxic, liquid, five-membered ring compound, C4H5N, that is a component of chlorophyll and hemin.
[1825–35; < Greek pyrr(hós) red]
pyr•rol•ic (pɪˈrɒl ɪk, -ˈroʊ lɪk) adj.
References in periodicals archive ?
Generally, during normal hydrogenation of MD, pyrrholes (indoles and carbazoles) are hard to be removed because of their lowest adsorption ability and 'hindrance' effect.