Pyridines

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339784 4-Bromo-2,3,5,6-tetrafluoropyridine 98% C5BrF4N
427659 3-Chloro-2,4,5,6-tetrafluoropyridine 98% C5ClF4N
158798 Pentafluoropyridine ≥99% C5F5N
735086 5-Chloro-2,3-difluoro-4-iodopyridine 95% C5HClF2IN
316679 2,3,5,6-Tetrafluoropyridine 95% C5HF4N
ADE000396 2-Chloro-5-fluoro-3-iodo-pyridine AldrichCPR C5H2ClFIN
720208 2,3-Difluoro-5-chloropyridine 95% C5H2ClF2N
300624 4-Amino-2,3,5,6-tetrafluoropyridine 98% C5H2F4N2
723339 2-Bromo-4-fluoropyridine 96% C5H3BrFN
595675 2-Bromo-5-fluoropyridine 97% C5H3BrFN
CDS002875 2-Bromo-6-fluoropyridine AldrichCPR C5H3BrFN
646296 3-Bromo-5-fluoropyridine 97% C5H3BrFN
722421 4-Bromo-2-fluoropyridine 97% C5H3BrFN
520438 5-Bromo-2-fluoropyridine 99% C5H3BrFN
636576 2-Chloro-3-fluoropyridine 97% C5H3ClFN
643556 2-Chloro-5-fluoropyridine 95% C5H3ClFN
71585 4-Chloro-3-fluoropyridine ≥95.0% C5H3ClFN
662976 5-Chloro-2-fluoropyridine 97% C5H3ClFN
755389 2-Fluoro-3-iodopyridine 97% C5H3FIN
660043 2-Fluoro-5-iodopyridine 97% C5H3FIN
ADE000285 3-Fluoro-2-iodo-pyridine AldrichCPR C5H3FIN
685216 3-Fluoro-4-iodopyridine 97% C5H3FIN
ADE000397 5-Fluoro-3-iodo-pyridin-2-ol AldrichCPR C5H3FINO
718173 2,3-Difluoropyridine 95% C5H3F2N
233277 2,6-Difluoropyridine 99% C5H3F2N
703923 3,5-Difluoropyridine 97% C5H3F2N
CDS002736 2-Amino-3,5,6-trifluoropyridine AldrichCPR C5H3F3N2
722383 2-Amino-3-bromo-5-fluoropyridine 97% C5H4BrFN2
722391 3-Amino-5-bromo-2-fluoropyridine 97% C5H4BrFN2
714631 2-Amino-5-chloro-3-fluoropyridine 97% C5H4ClFN2
ADE000390 5-Fluoro-3-iodo-pyridin-2-ylamine AldrichCPR C5H4FIN2
F15250 2-Fluoropyridine 98% C5H4FN
196665 3-Fluoropyridine 99% C5H4FN
CDS019949 2-Fluoro-6-hydroxypyridine AldrichCPR C5H4FNO
CDS019950 3-Fluoro-2-hydroxypyridine AldrichCPR C5H4FNO
CDS006721 3-fluoro-5-hydroxypyridine AldrichCPR C5H4FNO
753181 5-Fluoro-2-hydroxypyridine 97% C5H4FNO
734888 2-Amino-3,5-difluoropyridine 97% C5H4F2N2
707341 2-Amino-3-fluoropyridine 97% C5H5FN2
518689 2-Amino-5-fluoropyridine 97% C5H5FN2
725064 2-Amino-6-fluoropyridine 98% C5H5FN2
728675 3-Amino-2-fluoropyridine 95% C5H5FN2
732176 3-Amino-5-fluoropyridine C5H5FN2
720232 4-Amino-2-fluoropyridine 96% C5H5FN2
704490 4-Amino-3-fluoropyridine 97% C5H5FN2
714593 5-Amino-2-fluoropyridine 97% C5H5FN2
697087 2,6-Diamino-3,5-difluoropyridine 97% C5H5F2N3
344591 2,3,5,6-Tetrafluoro-4-pyridinecarbonitrile 99% C6F4N2
422169 2,6-Dichloro-5-fluoro-3-pyridinecarbonitrile 98% C6HCl2FN2
660620 2,3,6-Trifluoro-4-(trifluoromethyl)pyridine 95% C6HF6N
CDS019825 3-Bromo-5-fluoropicolinonitrile AldrichCPR C6H2BrFN2
ADE000134 5-Bromo-3-fluoropicolinonitrile AldrichCPR C6H2BrFN2
ADE000217 3-Bromo-5-nitropyridin-4-yl trifluoromethanesulfonate AldrichCPR C6H2BrF3N2O5S
733237 3-Bromo-2-fluoro-5-(trifluoromethyl)pyridine 97% C6H2BrF4N
ADE001402 2-Chloro-5-fluoronicotinonitrile AldrichCPR C6H2ClFN2
472298 2,6-Dichloro-5-fluoropyridine-3-carboxylic acid 97% C6H2Cl2FNO2
736066 3,5-Difluoropyridine-2-carbonitrile 97% C6H2F2N2
660647 2,3,5-Trifluoropyridine-4-carboxylic acid 97% C6H2F3NO2
660639 2,3,6-Trifluoropyridine-4-carboxylic acid 90% C6H2F3NO2
ANV00087 6-Bromo-3-fluoro-2-formylpyridine AldrichCPR C6H3BrFNO
ADE000140 5-Bromo-3-fluoropicolinic acid AldrichCPR C6H3BrFNO2
753483 5-Bromo-3-fluoropyridine-2-carboxylic acid 95% C6H3BrFNO2
722448 6-Bromo-5-fluoropyridine-3-carboxylic acid 96% C6H3BrFNO2
ADE000400 2-Chloro-5-fluoro-pyridine-3-carbaldehyde AldrichCPR C6H3ClFNO
CDS015974 5-chloro-2-fluoronicotinaldehyde AldrichCPR C6H3ClFNO
660582 2-Chloro-3-fluoropyridine-4-carboxylic acid 97% C6H3ClFNO2
697338 2-Chloro-5-fluoropyridine-3-carboxylic acid technical grade C6H3ClFNO2
656348 Lithium 3-fluoropyridine-2-carboxylate 90% C6H3LiFNO2
703982 2-Cyano-5-fluoropyridine 97% C6H3FN2
736058 2-Fluoropyridine-3-carbonitrile 97% C6H3FN2
697109 3-Fluoro-2-pyridinecarbonitrile 96% C6H3FN2
704016 4-Cyano-2-fluoropyridine 97% C6H3FN2
CDS002963 5-Cyano-2-fluoropyridine AldrichCPR C6H3FN2
704024 6-Fluoropyridine-2-carbonitrile 95% C6H3FN2
CDS009040 3,5-difluoro-4-formyl pyridine AldrichCPR C6H3F2NO
759392 2,3-Difluoropyridine-4-carboxylic acid 97% C6H3F2NO2
CDS001979 2,6-Difluoro-4-pyridinecarboxylic acid AldrichCPR C6H3F2NO2
CDS002726 3,5-Difluoroisonicotinic acid AldrichCPR C6H3F2NO2
736082 3,5-Difluoropyridine-2-carboxylic acid 95% C6H3F2NO2
739774 3,6-Difluoropyridine-2-carboxylic acid 97% C6H3F2NO2
716294 2-Fluoro-4-(trifluoromethyl)pyridine ≥94% C6H3F4N
730181 3-Fluoro-2-(trifluoromethyl)pyridine 96% C6H3F4N
665665 3-Fluoro-4-(trifluoromethyl)pyridine 97% C6H3F4N
664111 2-Fluoro-3-pyridinecarboxaldehyde 97% C6H4FNO
644315 3-Fluoro-4-pyridinecarbaldehyde 97% C6H4FNO
CDS005163 5-fluoro-2-formylpyridine AldrichCPR C6H4FNO
593176 2-Fluoro-3-pyridinecarboxylic acid 97% C6H4FNO2
593885 2-Fluoro-4-pyridinecarboxylic acid 97% C6H4FNO2
638757 3-Fluoro-4-pyridinecarboxylic acid 97% C6H4FNO2
734233 5-Fluoropyridine-3-carboxylic acid C6H4FNO2
593664 6-Fluoro-2-pyridinecarboxylic acid 97% C6H4FNO2
593761 6-Fluoropyridine-3-carboxylic acid 97% C6H4FNO2
731072 2-Bromo-5-fluoro-3-methylpyridine 97% C6H5BrFN
CDS003028 5-Bromo-2-fluoro-3-methylpyridine AldrichCPR C6H5BrFN
CDS002984 6-Bromo-3-fluoro-2-methylpyridine AldrichCPR C6H5BrFN
CDS003110 5-Chloro-2-fluoro-4-methylpyridine AldrichCPR C6H5ClFN
ADE000404 (2-Chloro-5-fluoro-pyridin-3-yl)-methanol AldrichCPR C6H5ClFNO
ADE000398 2-Amino-5-fluoro-pyridine-3-carbaldehyde AldrichCPR C6H5FN2O
CDS002906 6-Fluoro-2-methyl-3-nitropyridine AldrichCPR C6H5FN2O2
533246 2-Fluoro-3-methylpyridine 97% C6H6FN
533254 2-Fluoro-4-methylpyridine 98% C6H6FN
595136 2-Fluoro-5-methylpyridine 97% C6H6FN
533262 2-Fluoro-6-methylpyridine 97% C6H6FN
733318 3-Amino-6-fluoro-4-methylpyridine 95% C6H7FN2
CDS017686 5-amino-2-fluoro-3-picoline AldrichCPR C6H7FN2
707376 2-Fluoro-4-(trifluoromethyl)pyridine-3-carboxylic acid 97% C7H3F4NO2
ADE000139 1-(5-Bromo-3-fluoropyridin-2-yl)ethanone AldrichCPR C7H5BrFNO
ADE000142 Methyl 5-bromo-3-fluoropicolinate AldrichCPR C7H5BrFNO2
ADE000775 1-(2-Chloro-5-fluoropyridin-3-yl)ethanone AldrichCPR C7H5ClFNO
ADE000416 Methyl 2-chloro-5-fluoronicotinate AldrichCPR C7H5ClFNO2
CDS014714 5-cyano-2-fluoro-3-picoline AldrichCPR C7H5FN2
737216 2-Chloro-4-(1,1-difluoroethyl)pyridine 95% C7H6ClF2N
CDS015789 2-fluoro-5-formyl-3-picoline AldrichCPR C7H6FNO
701904 Methyl 2-fluoropyridine-3-carboxylate 97% C7H6FNO2
697869 Methyl 2-fluoropyridine-4-carboxylate 97% C7H6FNO2
697842 Methyl 6-fluoropyridine-2-carboxylate 97% C7H6FNO2
697850 Methyl 6-fluoropyridine-3-carboxylate 97% C7H6FNO2
CDS015927 5-fluoro-2-methoxynicotinic acid AldrichCPR C7H6FNO3
ADE000122 3-(2-Amino-5-fluoropyridin-3-yl)prop-2-yn-1-ol AldrichCPR C8H7FN2O
ADE000131 3-(2-Chloro-5-fluoropyridin-3-yl)propan-1-ol AldrichCPR C8H9ClFNO
ADE000130 5-Fluoro-3-(3-hydroxypropyl)pyridin-2-ol AldrichCPR C8H10FNO2
ADE000128 3-(2-Amino-5-fluoropyridin-3-yl)propan-1-ol AldrichCPR C8H11FN2O
ADE000148 3-Fluoro-5-(3-hydroxyprop-1-yn-1-yl)picolinonitrile AldrichCPR C9H5FN2O
ADE000155 N-(1-(5-Bromo-3-fluoropyridin-2-yl)vinyl)acetamide AldrichCPR C9H8BrFN2O
ADE000823 3-Bromo-2-fluoro-4-iodo-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H9BrFIN2
ADE000816 3-Chloro-2-fluoro-4-iodo-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H9ClFIN2
ADE000824 2-Fluoro-3,4-diiodo-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H9FI2N2
ADE001403 3-Fluoro-5-(3-hydroxypropyl)picolinonitrile AldrichCPR C9H9FN2O
ADE000118 (E)-Methyl 3-(2-amino-5-fluoropyridin-3-yl)acrylate AldrichCPR C9H9FN2O2
ADE000103 3-Bromo-2-fluoro-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H10BrFN2
ADE000730 2-Fluoro-3-iodo-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H10FIN2
ADE000741 2-Fluoro-4-iodo-6-(pyrrolidin-1-yl)pyridine AldrichCPR C9H10FIN2
ADE000121 Methyl 3-(2-amino-5-fluoropyridin-3-yl)propanoate AldrichCPR C9H11FN2O2
CDS001242 5-Chloro-2′-fluoro-2,3′-bipyridine AldrichCPR C10H6ClFN2
ADE000149 (E)-Methyl 3-(6-cyano-5-fluoropyridin-3-yl)acrylate AldrichCPR C10H7FN2O2
472271 Ethyl 2,6-dichloro-5-fluoro-β-oxo-3-pyridinepropionate 98% C10H8Cl2FNO3
CBR00733 1-(3-Pyridin-2-yl-1,2,4-oxadiazol-5-yl)methanamine trifluoroacetate AldrichCPR C10H9F3N4O3
CBR01074 1-(3-Pyridin-3-yl-1,2,4-oxadiazol-5-yl)methanamine trifluoroacetate salt AldrichCPR C10H9F3N4O3
ADE000115 2-Fluoro-6-(pyrrolidin-1-yl)isonicotinonitrile AldrichCPR C10H10FN3
ADE000818 2-Fluoro-6-(pyrrolidin-1-yl)nicotinonitrile AldrichCPR C10H10FN3
ADE000210 N-(4-Chloro-5-fluoro-3-iodopyridin-2-yl)pivalamide AldrichCPR C10H11ClFIN2O
ADE000105 2-Fluoro-6-(pyrrolidin-1-yl)isonicotinaldehyde AldrichCPR C10H11FN2O
ADE000784 2-Fluoro-6-(pyrrolidin-1-yl)nicotinaldehyde AldrichCPR C10H11FN2O
ADE000104 2-Fluoro-6-(pyrrolidin-1-yl)isonicotinic acid AldrichCPR C10H11FN2O2
ADE000786 2-Fluoro-6-(pyrrolidin-1-yl)nicotinic acid AldrichCPR C10H11FN2O2
ADE000116 N-(5-Fluoro-3-iodopyridin-2-yl)pivalamide AldrichCPR C10H12FIN2O
ADE000819 (E)-2-Fluoro-6-(pyrrolidin-1-yl)nicotinaldehyde oxime AldrichCPR C10H12FN3O
ADE000803 (1-(6-Fluoropyridin-2-yl)pyrrolidin-3-yl)methanol AldrichCPR C10H13FN2O
ADE000814 (2-Fluoro-6-(pyrrolidin-1-yl)pyridin-3-yl)methanol AldrichCPR C10H13FN2O
ADE000391 N-(5-Fluoro-pyridin-2-yl)-2,2-dimethyl-propionamide AldrichCPR C10H13FN2O
ADE001409 N-(5-Fluoro-3-hydroxypyridin-2-yl)pivalamide AldrichCPR C10H13FN2O2
902802 2-(2,4-Difluorophenyl)-5-fluoropyridine ≥95% C11H6F3N
667676 2-(2,4-Difluorophenyl)pyridine 97% C11H7F2N
ADE000216 N-(4-Cyano-5-fluoro-3-iodopyridin-2-yl)pivalamide AldrichCPR C11H11FIN3O
ADE000147 3-Fluoro-5-((trimethylsilyl)ethynyl)picolinonitrile AldrichCPR C11H11FN2Si
CBR01069 1-(3-Pyridin-2-yl-1,2,4-oxadiazol-5-yl)ethanamine trifluoroacetate salt AldrichCPR C11H11F3N4O3
CBR01070 1-(3-Pyridin-3-yl-1,2,4-oxadiazol-5-yl)ethanamine trifluoroacetate salt AldrichCPR C11H11F3N4O3
CBR01071 1-(3-Pyridin-4-yl-1,2,4-oxadiazol-5-yl)ethanamine trifluoroacetate salt AldrichCPR C11H11F3N4O3
CBR01073 2-(3-Pyridin-2-yl-1,2,4-oxadiazol-5-yl)ethanamine trifluoroacetate salt AldrichCPR C11H11F3N4O3
CBR01075 2-(3-Pyridin-3-yl-1,2,4-oxadiazol-5-yl)ethanamine trifluoroacetate salt AldrichCPR C11H11F3N4O3
CBR00727 N-Methyl-1-(3-pyridin-2-yl-1,2,4-oxadiazol-5-yl)methanamine trifluoroacetate AldrichCPR C11H11F3N4O3
CBR00728 N-Methyl-1-(3-pyridin-3-yl-1,2,4-oxadiazol-5-yl)methanamine trifluoroacetate AldrichCPR C11H11F3N4O3
ADE000204 N-(5-Fluoro-4-formyl-3-iodopyridin-2-yl)pivalamide AldrichCPR C11H12FIN2O2
ADE000205 5-Fluoro-3-iodo-2-pivalamidoisonicotinic acid AldrichCPR C11H12FIN2O3
ADE001404 N-(3-Cyano-5-fluoropyridin-2-yl)pivalamide AldrichCPR C11H12FN3O
ADE000211 (E)-N-(5-Fluoro-4-((hydroxyimino)methyl)-3-iodopyridin-2-yl)pivalamide AldrichCPR C11H13FIN3O2
ADE000783 1-(2-Fluoro-6-(pyrrolidin-1-yl)pyridin-3-yl)ethanone AldrichCPR C11H13FN2O
ADE000102 1-(2-Fluoro-6-(pyrrolidin-1-yl)pyridin-4-yl)ethanone AldrichCPR C11H13FN2O
ADE000795 Methyl 2-fluoro-6-(pyrrolidin-1-yl)nicotinate AldrichCPR C11H13FN2O2
ADE000114 N-(5-Fluoro-3-formylpyridin-2-yl)pivalamide AldrichCPR C11H13FN2O2
ADE000126 5-Fluoro-2-pivalamidonicotinic acid AldrichCPR C11H13FN2O3
ADE001405 N-(5-Fluoro-3-(hydroxymethyl)pyridin-2-yl)pivalamide AldrichCPR C11H15FN2O2
CDS016213 2-chloro-4-(4-fluorophenyl)nicotinonitrile AldrichCPR C12H6ClFN2
CDS018705 2-(4-fluorophenyl)nicotinaldehyde AldrichCPR C12H8FNO
654477 6-(4-Fluorophenyl)-2-pyridinecarboxaldehyde 97% C12H8FNO
902829 2-(2,4-Difluorophenyl)-5-methylpyridine ≥95% C12H9F2N
911623 2-(2,4-Difluorophenyl)-5-methoxypyridine ≥95% New C12H9F2NO
909343 2-(4-Fluorophenyl)-5-methylpyridine ≥95% C12H10FN
ADE000112 5-(2-Fluoro-6-(pyrrolidin-1-yl)pyridin-4-yl)oxazole AldrichCPR C12H12FN3O
ADE000794 3-(2-fluoro-6-(pyrrolidin-1-yl)pyridin-3-yl)prop-2-yn-1-ol AldrichCPR C12H13FN2O
ADE000787 3-Allyl-2-fluoro-6-(pyrrolidin-1-yl)pyridine AldrichCPR C12H15FN2
ADE000796 2-Fluoro-N-methoxy-N-methyl-6-(pyrrolidin-1-yl)nicotinamide AldrichCPR C12H16FN3O2
ADE000791 (E)-Methyl 3-(2-fluoro-6-(pyrrolidin-1-yl)pyridin-3-yl)acrylate AldrichCPR C13H15FN2O2
ADE000110 (E)-Methyl 3-(2-fluoro-6-(pyrrolidin-1-yl)pyridin-4-yl)acrylate AldrichCPR C13H15FN2O2
ADE000215 N-(4-(Dimethoxymethyl)-5-fluoro-3-iodopyridin-2-yl)pivalamide AldrichCPR C13H18FIN2O3
ADE000129 N-(5-Fluoro-3-(3-hydroxypropyl)pyridin-2-yl)pivalamide AldrichCPR C13H19FN2O2
ADE000206 N-(5-Fluoro-3-iodo-4-(trimethylsilyl)pyridin-2-yl)pivalamide AldrichCPR C13H20FIN2OSi
ADE000788 2-Fluoro-6-(pyrrolidin-1-yl)-3-((trimethylsilyl)ethynyl)pyridine AldrichCPR C14H19FN2Si
ADE000094 2-Fluoro-6-(pyrrolidin-1-yl)-4-((trimethylsilyl)ethynyl)pyridine AldrichCPR C14H19FN2Si
ADE000799 tert-Butyl 2-fluoro-6-(pyrrolidin-1-yl)pyridin-3-ylcarbamate AldrichCPR C14H20FN3O2
ADE000779 2-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-5-fluoro-3-iodopyridine AldrichCPR C16H26FIN2OSi
ADE000826 2-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-6-fluoro-4-iodopyridine AldrichCPR C16H26FIN2OSi
ADE000800 6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoro-3-iodopyridine AldrichCPR C16H26FIN2OSi
ADE000802 2-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-6-fluoropyridine AldrichCPR C16H27FN2OSi
ADE001414 tert-Butyl bis((3-fluoropyridin-2-yl)methyl)carbamate AldrichCPR C17H19F2N3O2
ADE000097 6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoronicotinonitrile AldrichCPR C17H26FN3OSi
ADE000821 6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoronicotinaldehyde AldrichCPR C17H27FN2O2Si
ADE000827 6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoronicotinic acid AldrichCPR C17H27FN2O3Si
ADE000095 (E)-6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoronicotinaldehyde oxime AldrichCPR C17H28FN3O2Si
ADE000096 (6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridin-3-yl)methanol AldrichCPR C17H29FN2O2Si
CDS005017 3,5-Difluoro-4-(tributylstannyl)pyridine AldrichCPR C17H29F2NSn
CDS005196 2-Fluoro-5-(tributylstannyl)pyridine AldrichCPR C17H30FNSn
ADE000822 1-(6-(3-((tert-Butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridin-3-yl)ethanone AldrichCPR C18H29FN2O2Si
592331 Diethyl 1,4-dihydro-2,6-dimethyl-4-(4-fluorophenyl)-3,5-pyridinedicarboxylate 97% C19H22FNO4
ADE000091 3-Allyl-6-(3-((tert-butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridine AldrichCPR C19H31FN2OSi
ADE000798 (trans racemic)-1-tert-butyl 3-methyl 4-(2-fluoro-6-(pyrrolidin-1-yl)pyridin-3-yl)pyrrolidine-1,3-dicarboxylate AldrichCPR C20H28FN3O4
ADE000092 (E)-Methyl 3-(6-(3-((tert-butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridin-3-yl)acrylate AldrichCPR C20H31FN2O3Si
ADE000119 (trans)-1-tert-butyl 3-methyl 4-(2-fluoro-6-(3-(hydroxymethyl)pyrrolidin-1-yl)pyridin-3-yl)pyrrolidine-1,3-dicarboxylate AldrichCPR C21H30FN3O5
ADE000098 tert-Butyl 6-(3-((tert-butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridin-3-ylcarbamate AldrichCPR C21H36FN3O3Si
ADE000108 (trans)-Methyl 1-benzyl-4-(6-(3-((tert-butyldimethylsilyloxy)methyl)pyrrolidin-1-yl)-2-fluoropyridin-3-yl)pyrrolidine-3-carboxylate AldrichCPR C29H42FN3O3Si