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1,1′-Thiocarbonyldiimidazole CAS 6160-65-2Heterocyclic Building BlocksPowderShips 2–8 °C from $74.99 7 options 1,2,3,4-Tetrahydroquinoline CAS 635-46-1Heterocyclic Building BlocksLiquid from $26.24 5 options 1,2,3-Benzotriazin-4(3H)-one CAS 90-16-4Heterocyclic Building BlocksPowder from $55.49 5 options 1,2,4-Triazole sodium salt CAS 41253-21-8Heterocyclic Building BlocksPowder from $14.24 12 options 1,2-Dimethylimidazole CAS 1739-84-0Heterocyclic Building BlocksSolid from $59.99 4 options 1,3-Bis(diphenylphosphino)propane nickel(II)chloride CAS 15629-92-2Heterocyclic Building BlocksPowder from $117.64 2 options 1,3-Diiodo-5,5-dimethylhydantoin CAS 2232-12-04Heterocyclic Building BlocksPowderShips 2–8 °C from $74.99 6 options 1,3-Dimethyluracil CAS 874-14-6Heterocyclic Building BlocksPowder from $76.49 5 options 1,4-Benzodioxan-2-carboxylic acid CAS 3663-80-7Heterocyclic Building BlocksPowder from $50.99 6 options 1-(2-Aminoethyl)piperidine CAS 27578-60-5Heterocyclic Building BlocksLiquid from $85.49 3 options 1-(2-Chloroethyl)pyrrolidine hydrochloride CAS 7250-67-1Heterocyclic Building BlocksPowder from $155.99 4 options 1-(2-Hydroxyethyl)piperazine CAS 103-76-4Heterocyclic Building BlocksLiquid from $44.50 4 options 1-(2-Hydroxyethyl)piperidine CAS 3040-44-6Heterocyclic Building BlocksLiquid from $20.24 5 options 1-(2-Methylphenyl piperazine) CAS 70849-60-4Heterocyclic Building BlocksPowder from $67.49 4 options 1-(3,4-Dichlorophenyl)piperazine CAS 57260-67-0Heterocyclic Building BlocksPowder from $224.99 5 options 1-(4-Fluorophenyl) piperazine CAS 2252-63-3Heterocyclic Building BlocksSolid from $88.49 6 options 1-(4-Methylphenyl) piperazine CAS 39593-08-3Heterocyclic Building BlocksLiquid $502.49 1 option 1-(4-Pyridyl)piperazine CAS 1008-91-9Heterocyclic Building BlocksPowder from $74.71 7 options 1-(4-Pyridyl)pyridinium chloride hydrochloride CAS 5421-92-1Heterocyclic Building BlocksPowder from $269.99 4 options 1-(Bromomethyl)-2,3,4,5,6-pentafluorobenzene CAS 1765-40-8Heterocyclic Building BlocksLiquid from $62.99 6 options 1-(tert-Butyldimethylsilyl)imidazole CAS 54925-64-3Heterocyclic Building BlocksLiquid from $50.99 4 options 1-Acetylpiperazine CAS 13889-98-0Heterocyclic Building BlocksPowder from $34.96 5 options 1-Aminopiperidine CAS 2213-43-6Heterocyclic Building BlocksLiquid from $95.99 5 options 1-Benzylimidazole CAS 4238-71-5Heterocyclic Building BlocksPowder from $20.24 7 options