SICHUAN HENGKANG SCIENCE AND TECHNOLOGY DEVELOPMENT CO.,LTD

Product Name: (S)-1-Boc-3-hydroxypiperidine CAS: 143900-44-1 MF: C10H19NO3 MW: 201.26 Specifications: Appearance/colourWhite to off-white solid It could be agglomerate after storing long times Identity(IR)Corresponds Assay(HPLC w/w)97.0%-103.0% Chemical purity (GC area)﹥ ﹦ 99.0% Impurity purity (GC w/w)3-Hydroxypiperidine﹤ ﹦ 0.1% 3-Hydroxypyridine﹤ ﹦ 0.20%Not Detected 1-Boc-3-piperidone﹤ ﹦ 0.10%Not Detected 1-Boc-4-hydroxypiperidine﹤ ﹦ 0.10%Not Detected 1.96RRT﹤ ﹦ 0.2%Not Detected Any Unspecified impurity﹤ ﹦ 0.08%0.01% Chiral purity(HPLC area)﹥ ﹦ 99.5% Methanol(GC)﹤ ﹦ 50ppm Ethanol(GC)﹤ ﹦ 50ppm DCM(GC)﹤ ﹦ 500ppm Water (KF vol w/w)﹤ ﹦ 0.5%

Tert-butyl (R)-3-(hydroxymethyl) piperazine-1-carboxylate Other Name: (R)-1-Boc-3-hydroxymethylpiperazine CAS: 278788-66-2 Molecular Formula: C10H20N2O3 Molecular Weight: 216.277 Specifications: Appearance/colourOff-white and little pink Chemical purity (GC area)≥98.0% Chiral purity (HPLC area)≥99.0% Water (KF)≤0.5%

Name: tert-butyl 4-(aminomethyl)piperidine-1-carboxylate Other Name: 1-Boc-4-Aminomethylpiperidine CAS: 144222-22-0 Molecular Formula: C11H22N2O2 Molecular Weight: 214.305 Specifications: 1 Appearance: Molten solid white 2 NMR : Corresponds (we can offer the NMR photograph) 3 Chemical purity(GC area: ) ≥98.0% 4 Water(K.F vol): ≤0.5%

Name: L-serine benzyl ester hydrochloride Other Name: H-Ser-OBzl . HCl CAS: 60022-62-0 Purity: above 97% Molecular Formula: C10H14ClNO3 Molecular Weight: 231.676 Specifications: 1. Appearance/colour Off-white to White powder 2. Identification by HPLC Corresponds 3. Chemical purity(HPLC area) ≥97.0% 4. Assay(Titration w/w ) 98.0%~103.0% 5. Water（vol %w/w) ≤1.0%