6-gliedrige Heterozyklen

Sechsgliedrige Heterozyklen sind organische Verbindungen, die einen sechsgliedrigen Ring mit einem oder mehreren Heteroatomen wie Stickstoff, Sauerstoff oder Schwefel enthalten. Diese Strukturen sind aufgrund ihrer Stabilität und Reaktivität in zahlreichen bioaktiven Molekülen und Pharmazeutika weit verbreitet. Sechsgliedrige Heterozyklen sind auch in der Synthese von Agrochemikalien, Farbstoffen und fortschrittlichen Materialien von entscheidender Bedeutung. Bei CymitQuimica bieten wir eine vielfältige Auswahl an hochwertigen sechsgliedrigen Heterozyklen zur Unterstützung Ihrer Forschungs- und Industrieanwendungen.

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Produkte pro Seite. 115107 Produkte in dieser Kategorie.

Produktdaten	Reinheit	Preisklasse	Voraussichtliche Lieferung
1,2,3,4-Tetrahydroquinolin-5-amine REF: 10-F329748CAS: 36887-98-6	95.0%	Nachfragen	Di 03 Sep 24
2-((5-Nitropyridin-2-yl)thio)benzo[d]thiazole REF: 10-F679789CAS: 146724-09-6	90%	Nachfragen	Di 03 Sep 24
(3-Fluoro-4-morpholinophenyl)boronic acid REF: 10-F447102CAS: 279262-09-8	95.0%	Nachfragen	Di 03 Sep 24
1-(4-Methoxypyridin-2-yl)piperazine trihydrochloride REF: 10-F343488CAS: 1707580-86-6	- - -	Nachfragen	Di 03 Sep 24
2-Chloro-6-(morpholin-4-yl)benzaldehyde REF: 10-F663854CAS: 68415-31-6	98%	Nachfragen	Di 03 Sep 24
Methyl 3-fluoro-5-formylpicolinate REF: 10-F604671CAS: 1260667-33-1	98%	Nachfragen	Di 03 Sep 24
6-ethyl-2-oxo-1,2-dihydro-4-pyridinecarboxylic acid REF: 10-F312749CAS: 54881-17-3	95.0%	Nachfragen	Di 03 Sep 24
1-BOC-4-METHYLAMINO-3,3-DIMETHYLPIPERIDINE REF: 10-F502628CAS: 1242240-00-1	95.0%	Nachfragen	Di 03 Sep 24
(S)-1-(5-BROMOPYRIDIN-3-YL)ETHANAMINE HCL REF: 10-F474265CAS: 1391497-54-3	95.0%	Nachfragen	Di 03 Sep 24
N1-methyl-N1-(tetrahydro-2H-pyran-4-yl)benzene-1,4-diamine REF: 10-F757776CAS: 1156243-17-2	95%	Nachfragen	Di 03 Sep 24
4-(2-Chloro-thiazol-5-ylmethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester REF: 10-F090299CAS: 1261231-87-1	- - -	Nachfragen	Di 03 Sep 24
2-Chloro-4-(dibenzo[b,d]furan-3-yl)-6-phenyl-1,3,5-triazine REF: 10-F764532CAS: 2142681-84-1	98%	Nachfragen	Di 03 Sep 24
3-Amino-5-chloropyridine REF: 10-F046489CAS: 22353-34-0	98.0%	Nachfragen	Di 03 Sep 24
3-(Difluoromethyl)-5-fluoropyridin-2(1H)-one REF: 10-F783488CAS: 1805304-17-9	98%	Nachfragen	Di 03 Sep 24
2-[(3-hexyl-4,8-dimethyl-2-oxo-2H-chromen-7-yl)oxy]propanoic acid REF: 10-F370689CAS: 438030-17-2	- - -	Nachfragen	Di 03 Sep 24
Ethyl-(1-methyl-piperidin-4-ylmethyl)-amine REF: 10-F087879CAS: 1249079-24-0	- - -	Nachfragen	Di 03 Sep 24
2-Amino-N-(1-benzyl-piperidin-4-yl)-acetamide REF: 10-F081989CAS: 226249-36-1	- - -	Nachfragen	Di 03 Sep 24
6-BROMO-2-CYCLOPROPYLPYRAZOLO[1,5-A]PYRIMIDINE REF: 10-F302286CAS: 916256-68-3	97.0%	Nachfragen	Di 03 Sep 24
3-(4-chlorophenyl)-1,5,6,7-tetrahydro-2H-cyclopenta[4,5]thieno[2,3-d]pyrimidine-2,4(3H)-dione REF: 10-F425550CAS: 309273-77-6	- - -	Nachfragen	Di 03 Sep 24
Ethyl 2-bromo-6-methyl-5H-pyrrolo[2,3-b]pyrazine-7-carboxylate REF: 10-F376973CAS: 125208-06-2	95.0%	Nachfragen	Di 03 Sep 24
Methyl 6-methylquinoline-3-carboxylate REF: 10-F777326CAS: 1238846-51-9	98%	Nachfragen	Di 03 Sep 24
3-(6-Phenoxy-pyridin-3-yl)-acrylic acid REF: 10-F317468CAS: 118420-05-6	95	Nachfragen	Di 03 Sep 24
3-cyclohexyl-5-cyclopropyl-2-sulfanylidene-1H,2H,3H,4H-thieno[2,3-d]pyrimidin-4-one REF: 10-F653638CAS: 852217-70-0	95%	Nachfragen	Di 03 Sep 24
2-fluoro-4'-thiomorpholinomethyl benzophenone REF: 10-F204515CAS: 898782-93-9	97.0%	Nachfragen	Di 03 Sep 24
2-(4-methylpiperazinomethyl)-2'-trifluoromethylbenzophenone REF: 10-F205483CAS: 898783-35-2	97.0%	Nachfragen	Di 03 Sep 24
5,6-diamino-3,4-dihydropyrimidine-4-thione REF: 10-F772500CAS: 2846-89-1	98%	Nachfragen	Di 03 Sep 24
4-(2,3-Dimethylphenyl)piperidine REF: 10-F671457CAS: 899359-27-4	95%	Nachfragen	Di 03 Sep 24
2-(4-bromophenyl)-8-methylquinoline-4-carbonyl chloride REF: 10-F368430CAS: 1160254-37-4	- - -	Nachfragen	Di 03 Sep 24
1-(4-Cyano-2-fluorophenyl)piperidine-4-carboxylic acid REF: 10-F656364CAS: 1156886-59-7	95%	Nachfragen	Di 03 Sep 24
DIETHYL PYRIDIN-2-YLMETHYLPHOSPHONATE REF: 10-F466796CAS: 39996-87-7	97.0%	Nachfragen	Di 03 Sep 24
2-(4-Morpholin-4-yl-phenyl)-ethylamine REF: 10-F059054CAS: 733756-63-3	- - -	Nachfragen	Di 03 Sep 24
1-[6-(4-Methoxyphenyl)pyridin-3-yl]ethanone REF: 10-F068442CAS: 1215576-19-4	97.0%	Nachfragen	Di 03 Sep 24
(2-HYDROXY-4-MORPHOLINOPHENYL)(4-METHOXYPHENYL)METHANONE REF: 10-F306339CAS: 404010-32-8	95.0%	Nachfragen	Di 03 Sep 24
6-Isopropoxypicolinaldehyde REF: 10-F632730CAS: 350697-31-3	98+%	Nachfragen	Di 03 Sep 24
3-(hydroxymethyl)-6-methoxy-1-methylquinolin-2(1H)-one REF: 10-F496205CAS: 114561-28-3	95.0%	Nachfragen	Di 03 Sep 24
5-Cyclopropyl-3-methoxypyridine REF: 10-F632909CAS: 1414870-78-2	97%	Nachfragen	Di 03 Sep 24
2-Amino-3-formyl-6-methylchromone REF: 10-F012026CAS: 68301-75-7	- - -	Nachfragen	Di 03 Sep 24
2-PYRROLIDIN-2-YLPYRIDINE HCL REF: 10-F330855CAS: 1312929-35-3	95.0%	Nachfragen	Di 03 Sep 24
5-amino-1,4-dihydroquinazolin-4-one REF: 10-F610736CAS: 135106-40-0	95+%	Nachfragen	Di 03 Sep 24
ethyl 5,7-dimethyl-2-(methylsulfonyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate REF: 10-F427998CAS: 860464-45-5	- - -	Nachfragen	Di 03 Sep 24
2-Chloro-5-ethylpyridine REF: 10-F220105CAS: 90196-32-0	95.0%	Nachfragen	Di 03 Sep 24
(5-Oxo-2,3,6,7,8,9-hexahydro-5H-[1,3]thiazolo[2,3-b]quinazolin-3-yl)acetic acid REF: 10-F511864CAS: 1105190-90-6	95.0%	Nachfragen	Di 03 Sep 24
2-methyl-3-[(2-pyridinylmethyl)amino]benzoic acid REF: 10-F315671CAS: 881445-78-9	95.0%	Nachfragen	Di 03 Sep 24
(6-(Trifluoromethyl)pyrimidin-4-yl)methanol REF: 10-F602777CAS: 1356111-18-6	97%	Nachfragen	Di 03 Sep 24
ethyl 6-bromo-4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carboxylate REF: 10-F519145CAS: 2167213-68-3	97.0%	Nachfragen	Di 03 Sep 24
4-(3,4-dimethylphenyl)-6-(3-methoxyphenyl)pyrimidin-2-amine REF: 10-F524844CAS: 1354936-26-7	95.0%	Nachfragen	Di 03 Sep 24
4-Bromo-6-methylquinoline REF: 10-F221906CAS: 1070879-23-0	95.0%	Nachfragen	Di 03 Sep 24
2-Ethylphenyl-(2-pyridyl)methanol REF: 10-F393169CAS: 92247-71-7	97.0%	Nachfragen	Di 03 Sep 24
2-(2,2-Difluoro-3-oxo-3,4-dihydro-2h-1,4-benzoxazin-4-yl)acetic acid REF: 10-F646427CAS: 1423027-83-1	97%	Nachfragen	Di 03 Sep 24
2-[(methylamino)methyl]-4(3H)-quinazolinone dihydrochloride dihydrate REF: 10-F359003CAS: 143993-12-8	95.0%	Nachfragen	Di 03 Sep 24
4-aminopiperidine-1-sulfonamide hydrochloride REF: 10-F494790CAS: 1820640-75-2	95.0%	Nachfragen	Di 03 Sep 24
2-(3-Bromo-2-pyridyl)acetic acid hydrochloride REF: 10-F625926CAS: 192642-86-7	98%	Nachfragen	Di 03 Sep 24
4-(Morpholinosulfonyl)-2-(trifluoromethyl)aniline REF: 10-F697938CAS: 55080-76-7	98%	Nachfragen	Di 03 Sep 24
Ethyl-(1-methyl-piperidin-2-ylmethyl)-amine REF: 10-F087877CAS: 66300-62-7	- - -	Nachfragen	Di 03 Sep 24
2-isopropyl-4-pyrimidinecarbaldehyde REF: 10-F311413CAS: 944901-13-7	95.0%	Nachfragen	Di 03 Sep 24
5-Bromo-2,4-diethoxypyrimidine REF: 10-F635284CAS: 132164-47-7	98%	Nachfragen	Di 03 Sep 24
2-Bromo-5,6-dichloropyridin-3-amine REF: 10-F211766CAS: 1253889-50-7	95.0%	Nachfragen	Di 03 Sep 24
tert-Butyl 3-bromo-5,8-dihydro-1,7-naphthyridine-7(6H)-carboxylate REF: 10-F621395CAS: 1823228-83-6	98+%	Nachfragen	Di 03 Sep 24
3-(2-(3,4-Dimethylphenyl)-4-oxopyrazolo[1,5-a]pyrazin-5(4H)-yl)propanoic acid REF: 10-F731947CAS: 1255779-17-9	98%	Nachfragen	Di 03 Sep 24
5'-Choloro-5'-deoxy-N6-methyladenosine REF: 10-F737728CAS: 19254-36-5	98%	Nachfragen	Di 03 Sep 24
(R)-8-(Benzyloxy)-5-(2-bromo-1-hydroxyethyl)quinolin-2(1H)-one REF: 10-F213722CAS: 530084-79-8	95.0%	Nachfragen	Di 03 Sep 24
5-Bromo-1H-pyrrolo[3,2-b]pyridin-3-amine REF: 10-F668135CAS: 1190311-18-2	98%	Nachfragen	Di 03 Sep 24
octahydropyrrolo[1,2-a]pyrazine oxalate (1:2) REF: 10-F386018CAS: 1192657-15-0	97%	Nachfragen	Di 03 Sep 24
2,5-Dimethyl-1-(pyridin-2-ylmethyl)-1h-pyrrole-3-carboxylic acid REF: 10-F661201CAS: 953717-09-4	95%	Nachfragen	Di 03 Sep 24
2-(5-Methoxypyridin-2-yl)-2-methylpropan-1-amine dihydrochloride REF: 10-F097097CAS: 1439899-28-1	- - -	Nachfragen	Di 03 Sep 24
6-Amino-1,2-dimethylquinolin-4(1H)-one REF: 10-F757148CAS: 860501-46-8	98%	Nachfragen	Di 03 Sep 24
N-(2-(allyloxy)benzyl)-1-(pyridin-3-yl)methanamine REF: 10-F729272CAS: 774190-46-4	97%	Nachfragen	Di 03 Sep 24
Methyl 5-bromo-4-cyanonicotinate REF: 10-F786068CAS: 1805104-26-0	98%	Nachfragen	Di 03 Sep 24
1-[(6-chloropyridin-3-yl)methyl]piperidine-3-carboxylic acid REF: 10-F369285CAS: 1119499-71-6	- - -	Nachfragen	Di 03 Sep 24
3-(2,3-Dimethylphenoxy)piperidine REF: 10-F687040CAS: 946681-02-3	98%	Nachfragen	Di 03 Sep 24
6-Chloro-n4-cyclohexylpyrimidine-4,5-diamine REF: 10-F716969CAS: 5449-10-5	98%	Nachfragen	Di 03 Sep 24
Ethyl 4-chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylate REF: 10-F076937CAS: 144927-57-1	95.0%	Nachfragen	Di 03 Sep 24
(S)-2-Amino-N-(1-benzyl-piperidin-3-yl)-N-cyclopropyl-3-methyl-butyramide REF: 10-F082151CAS: 1354033-21-8	- - -	Nachfragen	Di 03 Sep 24
cyclohexyl 4-(4-methylpiperazinomethyl)phenyl ketone REF: 10-F204592CAS: 898763-54-7	97.0%	Nachfragen	Di 03 Sep 24
Ethyl 4,5-dichloro-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate REF: 10-F729142CAS: 853105-72-3	95+%	Nachfragen	Di 03 Sep 24
2-(3,4-Dichlorobenzoyl)-6-methylpyridine REF: 10-F202825CAS: 1187170-00-8	97.0%	Nachfragen	Di 03 Sep 24
2-(4-(Thiophen-2-ylsulfonyl)piperazin-1-yl)ethan-1-ol REF: 10-F748767CAS: 138890-94-5	95%	Nachfragen	Di 03 Sep 24
Piperidin-4-yl-(1-thiazol-2-yl-ethyl)-amine hydrochloride REF: 10-F090835CAS: 1289386-57-7	95.0%	Nachfragen	Di 03 Sep 24
n-(4-Bromophenyl)-2-(4-(4-fluorophenyl)piperazin-1-yl)acetamide REF: 10-F707247CAS: 303091-47-6	90%	Nachfragen	Di 03 Sep 24
(3-Methyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl)methanol hydrochloride REF: 10-F620888CAS: 253345-80-1	95+%	Nachfragen	Di 03 Sep 24
[Ethyl-((R)-1-methyl-piperidin-3-yl)-amino]-acetic acid REF: 10-F082421CAS: 1354002-64-4	- - -	Nachfragen	Di 03 Sep 24
3-{[(tert-butoxy)carbonyl][(pyridin-2-yl)methyl]amino}propanoic acid REF: 10-F522654	95.0%	Nachfragen	Di 03 Sep 24
5-(Propan-2-yl)-4h,5h,6h,7h-[1,3]thiazolo[5,4-c]pyridine-2-carbaldehyde REF: 10-F651566CAS: 1341653-34-6	95%	Nachfragen	Di 03 Sep 24
3-(Benzyloxy)-6-methyl-4-oxo-4H-pyran-2-carboxylic acid REF: 10-F765063CAS: 216581-47-4	98%	Nachfragen	Di 03 Sep 24
5-Bromo-8-nitro-1,2,3,4-tetrahydroisoquinoline hydrochloride REF: 10-F619194CAS: 1803595-97-2	95%	Nachfragen	Di 03 Sep 24
3-[(4,6-Dimethylpyrimidin-2-yl)(methyl)amino]benzoic acid REF: 10-F023727CAS: 387350-52-9	95.0%	Nachfragen	Di 03 Sep 24
5-(Benzyloxy)-1-methyl-6-oxo-1,6-dihydropyrimidine-4-carboxylic acid REF: 10-F610225CAS: 1338091-25-0	98%	Nachfragen	Di 03 Sep 24
tert-Butyl 4-(2-amino-3-fluorophenoxy)piperidine-1-carboxylate REF: 10-F063814CAS: 1286264-75-2	95.0%	Nachfragen	Di 03 Sep 24
5-Bromo-2,6-dimethoxypyridine-3-boronic acid pinacol ester REF: 10-F627625CAS: 2121511-88-2	98%	Nachfragen	Di 03 Sep 24
4-Chloroacetyl-piperazine-1-carboxylic acid tert-butyl ester REF: 10-F024957CAS: 190001-40-2	98.0%	Nachfragen	Di 03 Sep 24
Ethyl (Z)-2-cyano-3-(2,2-dimethyltetrahydro-2H-pyran-4-yl)acrylate REF: 10-F730688CAS: 330998-23-7	98%	Nachfragen	Di 03 Sep 24
2-(4-Hexyloxybenzoyl)-6-methoxypyridine REF: 10-F203087CAS: 1187166-42-2	97.0%	Nachfragen	Di 03 Sep 24
3-(Piperidin-4-yl)benzo[d][1,2,3]triazin-4(3H)-one hydrochloride REF: 10-F464377CAS: 1956355-38-6	95.0%	Nachfragen	Di 03 Sep 24
4-Bromo-3-fluoropyridine hydrochloride REF: 10-F079196CAS: 1159811-44-5	97.0%	Nachfragen	Di 03 Sep 24
7-METHYL-2,3-DIHYDROQUINOLIN-4(1H)-ONE REF: 10-F469055CAS: 36053-96-0	95.0%	Nachfragen	Di 03 Sep 24
6,6-Dimethyl-3-azabicyclo[3.1.0]hexane-2,4-dione REF: 10-F228867CAS: 194421-56-2	95.0%	Nachfragen	Di 03 Sep 24
7-Fluoro-2H-benzo[e][1,2,4]thiadiazin-3(4H)-one 1,1-dioxide REF: 10-F604930CAS: 152721-97-6	98%	Nachfragen	Di 03 Sep 24
C-[2-(4-Nitro-phenyl)-imidazo[1,2-a]pyridin-3-yl]-methylamine REF: 10-F020349CAS: 725253-25-8	- - -	Nachfragen	Di 03 Sep 24
4'-(METHOXYCARBONYL)-[2,2'-BIPYRIDINE]-4-CARBOXYLIC ACID REF: 10-F468610CAS: 161955-60-8	95.0%	Nachfragen	Di 03 Sep 24
n1,n1-Dimethyl-n3-(pyridin-4-ylmethyl)propane-1,3-diamine REF: 10-F712171CAS: 626216-60-2	98%	Nachfragen	Di 03 Sep 24

1g		Nachfragen
2.5g		Nachfragen
50mg		Nachfragen
100mg		Nachfragen
250mg		Nachfragen
500mg		Nachfragen

1g		72,00 €
5g		244,00 €
10g		Nachfragen
250mg		Nachfragen

1g		Nachfragen
5g		57,00 €

1g		190,00 €
5g		506,00 €
10g		Nachfragen
250mg		87,00 €

1g		126,00 €
5g		485,00 €
2.5g		Nachfragen
250mg		67,00 €

6-gliedrige Heterozyklen

1,2,3,4-Tetrahydroquinolin-5-amine

Ref: 10-F329748

2-((5-Nitropyridin-2-yl)thio)benzo[d]thiazole

Ref: 10-F679789

(3-Fluoro-4-morpholinophenyl)boronic acid

Ref: 10-F447102

1-(4-Methoxypyridin-2-yl)piperazine trihydrochloride

Ref: 10-F343488

2-Chloro-6-(morpholin-4-yl)benzaldehyde

Ref: 10-F663854

Methyl 3-fluoro-5-formylpicolinate

Ref: 10-F604671

6-ethyl-2-oxo-1,2-dihydro-4-pyridinecarboxylic acid

Ref: 10-F312749

1-BOC-4-METHYLAMINO-3,3-DIMETHYLPIPERIDINE

Ref: 10-F502628

(S)-1-(5-BROMOPYRIDIN-3-YL)ETHANAMINE HCL

Ref: 10-F474265

N1-methyl-N1-(tetrahydro-2H-pyran-4-yl)benzene-1,4-diamine

Ref: 10-F757776

4-(2-Chloro-thiazol-5-ylmethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

Ref: 10-F090299

2-Chloro-4-(dibenzo[b,d]furan-3-yl)-6-phenyl-1,3,5-triazine

Ref: 10-F764532

3-Amino-5-chloropyridine

Ref: 10-F046489

3-(Difluoromethyl)-5-fluoropyridin-2(1H)-one

Ref: 10-F783488

2-[(3-hexyl-4,8-dimethyl-2-oxo-2H-chromen-7-yl)oxy]propanoic acid

Ref: 10-F370689

Ethyl-(1-methyl-piperidin-4-ylmethyl)-amine

Ref: 10-F087879

2-Amino-N-(1-benzyl-piperidin-4-yl)-acetamide

Ref: 10-F081989

6-BROMO-2-CYCLOPROPYLPYRAZOLO[1,5-A]PYRIMIDINE

Ref: 10-F302286

3-(4-chlorophenyl)-1,5,6,7-tetrahydro-2H-cyclopenta[4,5]thieno[2,3-d]pyrimidine-2,4(3H)-dione

Ref: 10-F425550

Ethyl 2-bromo-6-methyl-5H-pyrrolo[2,3-b]pyrazine-7-carboxylate

Ref: 10-F376973

Methyl 6-methylquinoline-3-carboxylate

Ref: 10-F777326

3-(6-Phenoxy-pyridin-3-yl)-acrylic acid

Ref: 10-F317468

3-cyclohexyl-5-cyclopropyl-2-sulfanylidene-1H,2H,3H,4H-thieno[2,3-d]pyrimidin-4-one

Ref: 10-F653638

2-fluoro-4'-thiomorpholinomethyl benzophenone

Ref: 10-F204515

2-(4-methylpiperazinomethyl)-2'-trifluoromethylbenzophenone

Ref: 10-F205483

5,6-diamino-3,4-dihydropyrimidine-4-thione

Ref: 10-F772500

4-(2,3-Dimethylphenyl)piperidine

Ref: 10-F671457

2-(4-bromophenyl)-8-methylquinoline-4-carbonyl chloride

Ref: 10-F368430

1-(4-Cyano-2-fluorophenyl)piperidine-4-carboxylic acid

Ref: 10-F656364

DIETHYL PYRIDIN-2-YLMETHYLPHOSPHONATE

Ref: 10-F466796

2-(4-Morpholin-4-yl-phenyl)-ethylamine

Ref: 10-F059054

1-[6-(4-Methoxyphenyl)pyridin-3-yl]ethanone

Ref: 10-F068442

(2-HYDROXY-4-MORPHOLINOPHENYL)(4-METHOXYPHENYL)METHANONE

Ref: 10-F306339

6-Isopropoxypicolinaldehyde

Ref: 10-F632730

3-(hydroxymethyl)-6-methoxy-1-methylquinolin-2(1H)-one

Ref: 10-F496205

5-Cyclopropyl-3-methoxypyridine

Ref: 10-F632909

2-Amino-3-formyl-6-methylchromone

Ref: 10-F012026

2-PYRROLIDIN-2-YLPYRIDINE HCL

Ref: 10-F330855

5-amino-1,4-dihydroquinazolin-4-one

Ref: 10-F610736

ethyl 5,7-dimethyl-2-(methylsulfonyl)pyrazolo[1,5-a]pyrimidine-3-carboxylate