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By certification 
1-Boc-piperazine 143238-38-4 White to off-white powder > = 98%
N-Phenylpiperazine 92-54-6 White to off-white powder > = 98%
5,6,7,7a-Tetrahydrothieno[3,2-c]pyridine-2(4H)-one hydrochloride 115473-15-9 off-white to White powder >98%
4-Piperidinemethanol 6457-49-4 Yellow crystal powder Purity>=98
N-Boc-4-Piperidone 79099-07-3 White crystal powder
N-Cbz-4-Piperidone 19099-93-5 White crystal powder
4-Piperidinecarboxamide 39546-32-2 White to off-white powder > = 98%
1-methyl-4-Chloropiperidine 4-chloro-1-methylpiperidine CAS:5570-77-4 Light yellow liquid Purity > = 99
N-Phenylpiperazine 92-54-6 White to off-white powder > = 98%
5,6,7,7a-Tetrahydrothieno[3,2-c]pyridine-2(4H)-one hydrochloride 115473-15-9 off-white to White powder >98%
4-Piperidinemethanol 6457-49-4 Yellow crystal powder Purity>=98
N-Boc-4-Piperidone 79099-07-3 White crystal powder
N-Cbz-4-Piperidone 19099-93-5 White crystal powder
4-Piperidinecarboxamide 39546-32-2 White to off-white powder > = 98%
1-methyl-4-Chloropiperidine 4-chloro-1-methylpiperidine CAS:5570-77-4 Light yellow liquid Purity > = 99