pyrraline
a heterocyclic aldehyde and primary alcohol with formal name 5-(hydroxymethyl)-1H-pyrrole-2-carbaldehyde

pyrrhoxanthininol
A particular carotenoid.

pyrrol
Alternative spelling of pyrrole.

pyrrole
Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, C₄H₅N.

pyrroles
plural of pyrrole

pyrrolide
The univalent anion derived from pyrrolidine by loss of a hydrogen ion

pyrrolides
plural of pyrrolide

pyrrolidine
Any of a class of heterocyclic amines having a saturated five-membered ring; especially the parent compound of this class, C₄H₉N.

pyrrolidines
plural of pyrrolidine

pyrrolidinium
A cation formed by protonation of a pyrrolidine

pyrrolidiniums
plural of pyrrolidinium

pyrrolidinone
Any heterocyclic ketone derived from pyrrolidine, but especially any 2-pyrrolidinone (a form of cyclic amide)

pyrrolidinones
plural of pyrrolidinone

pyrrolidone
any of a class of heterocyclic ketones derived from a pyrrolidine; especially 2-pyrrolidone, the simplest γ-lactam

pyrrolidones
plural of pyrrolidone

pyrrolidonyl
A univalent radical derived from pyrrolidone

pyrrolinone
A cyclic ketone formally derived from 2-pyrroline

pyrrolinones
plural of pyrrolinone

pyrrolizidine
Any of a class of alkaloids, found in many plants, that are hepatotoxic.

pyrrolizidines
plural of pyrrolizidine

pyrrolone
Any heterocyclic ketone derived from pyrrole

pyrrolones
plural of pyrrolone

pyrrolopyridine
Any heterobicyclic compound containing fused pyrrole and pyridine rings

pyrrolopyridines
plural of pyrrolopyridine

pyrrols
plural of pyrrol

pyrrolysyl
A univalent radical derived from pyrrolysine

pyruvamide
The amide of pyruvic acid CH₃-CO-CONH₂

pyruvate
Any salt or ester of pyruvic acid.

pyruvates
plural of pyruvate

pyruvil
A complex nitrogenous compound obtained by heating together pyruvic acid and urea.

pyruvin
A poorly-characterised derivative of pyruvic acid formed by heating glycerol with tartaric acid

pyruvoyl
The univalent radical derived from pyruvic acid by loss of a hydroxyl group

pyruvoyls
plural of pyruvoyl

pyruvyl
The univalent radical derived from pyruvic acid by loss of a hydrogen atom

pyruvyls
plural of pyruvyl

pyrylium
A six-member aromatic heterocyclic cation containing five carbon atoms and an oxygen atom that carries a positive charge; any derivative of this compound.

pyryliums
plural of pyrylium

qiviut
The underwool of the Arctic muskox, used as a fibre.

quadium
Alternative form of quadrium.

quadriphosphate
Any salt or ester containing four phosphate groups.

quadriphosphates
plural of quadriphosphate

quadristearate
Any ester containing four stearate groups.

quadristearates
plural of quadristearate

quadrium
Synonym of quadrivium.

quadroxide
A tetroxide.

quadroxides
plural of quadroxide

quadrupel
A kind of dark beer with 10% or more alcohol by volume.

quadrupels
plural of quadrupel

quantronium
A qubit composed of a Cooper pair

quantroniums
plural of quantronium

quarkonium
A flavorless meson whose constituents are a quark and its own antiquark.

quarkoniums
plural of quarkonium

quaternium
A quaternary ammonium functional group
A quaternary ammonium cation
A quaternary ammonium compound

quaterniums
plural of quaternium

quebecol
A polyphenolic compound extracted from maple syrup

quebrachitol
A polyhydroxy cyclic alcohol, 2-0-methyl-chiro-inositol, obtained from the latex of the rubber tree as a starting point in the synthesis of several pharmaceuticals

quercetagitrin
A glucoside of quercetagetin.

quercetamide
An amide obtained from quercetin in the form of an amorphous orange-yellow powder.

quercimeritrin
A flavonol glucoside, with chemical formula C₂H₂₀O₁₂, found in cotton flowers.

quercin
A form of tannic acid extracted from acorns and oak-bark.

quercins
plural of quercin

quercitol
The sugar alcohol 5-deoxyinositol present in acorns and the bark of oaks

quercitrin
A glycoside formed from the flavonoid quercetin and the deoxy sugar rhamnose, a constituent of quercitron dye.

quinacetol
A particular fungicide.

quinalphos
An organothiophosphate chemical chiefly used as a pesticide.

quinamine
A particular alkaloid obtained from cinchona bark.

quinazamid
A particular fungicide.

quinazolinamine
Any aromatic amine derived from a quinazoline

quinazolinamines
plural of quinazolinamine

quinazolinedione
A derivative of a quinazoline having two carbonyls groups in the pyrimidine ring, but especially the parent compound 2,4-quinazolinedione

quinazolinediones
plural of quinazolinedione

quinazolinol
A form of phenol derived from a quinazoline

quinazolinols
plural of quinazolinol

quinazolinyl
A univalent radical derived from quinazoline.

quinazolinyls
plural of quinazolinyl

quinbolone
An anabolic steroid with weak androgenic effects.

quinclorac
A selective herbicide used primarily to control weeds in rice crops.

quinidamine
A particular cinchona alkaloid.

quinizarin
A yellow crystalline substance produced artificially and isomeric with alizarin.

quinmerac
A particular auxin herbicide.

quinocetone
The genotoxin 1-(3-methyl-2-quinoxalinyl)-3-phenyl-2-propen-1-one N,N'-dioxide

quinol
Synonym of hydroquinone.

quinolate
Any salt or ester of a quinolinic acid

quinolates
plural of quinolate

quinolin
Dated form of quinoline.

quinolinamine
Any amine derivative of quinoline

quinolinamines
plural of quinolinamine

quinolinate
Any salt or ester of quinolinic acid.

quinolinates
plural of quinolinate

quinoline
Any of a class of aromatic heterocyclic compounds containing a benzene ring fused with a pyridine ring; especially the simplest such compound, C₉H₇N.

quinolinemethanethiol
A sulfoxymethyl derivative of quinoline that is present in the defensive spray of some skunks

quinolinemethanethiols
plural of quinolinemethanethiol

quinolines
plural of quinoline

quinolinium
The cation formed by protonation of a quinoline

quinoliniums
plural of quinolinium

quinolinolate
The anion (or O-derivative) derived from a hydroxyquinoline

quinolinolates
plural of quinolinolate

quinolinone
Any cyclic ketone derived from quinoline

quinolinones
plural of quinolinone

quinolins
plural of quinolin

quinolizidine
A bicyclic saturated heterocyclic compound in which a nitrogen atom serves as a bridge.

quinolizidines
plural of quinolizidine

quinolizinium
Any cation (with the charge on the nitrogen atom) derived from a quinolizine

quinoliziniums
plural of quinolizinium

quinols
plural of quinol

quinolyl
A univalent radical derived from quinoline

quinomethane
Any compound formally derived from a quinone by replacing either or both of the quinone oxygens with a methylidene group.

quinomethanes
plural of quinomethane

quinomethionate
A particular fungicide.

quinone
Any of a class of aromatic compounds having two carbonyl functional groups in the same six-membered ring.

quinonemethide
Alternative form of quinone methide.

quinovate
Any salt or ester of quinovic acid

quinovates
plural of quinovate

quinovin
An amorphous bitter glucoside derived from cinchona and other barks.

quinovose
A deoxy sugar, 6-deoxy-D-glucopyranose, that is widespread in plants, often as a sulfate

quinoxalinone
A bicyclic heterocyclic ketone derived from quinoxaline; any derivative of this compound

quinoxalinones
plural of quinoxalinone

quinoxalinyl
A univalent radical derived from quinoxaline.

quinoxalinyls
plural of quinoxalinyl

quinoxalyl
Any univalent radical formed from quinoxaline.

quinoxyfen
A particular fungicide.

quinoyl
A radical whose hydride is quinone, analogous to phenyl.

quinuclidinyl
the univalent radical derived from azabicyclooctane

quinuclidinyls
plural of quinuclidinyl

quisqualate
Any salt or ester of quisqualic acid.

quisqualates
plural of quisqualate

rabdolatifolin
A diterpenoid found in Rabdosia umbrosa var. latifolia.

racemocarbonate
A salt or ester of racemocarbonic acid.

racemocarbonates
plural of racemocarbonate