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And indeed, the company’s claimed that “customers who buy perishables through the offering shop twice as often as those who don’t.” As I will cover in a forthcoming column for Phenomenal World , Amazon’s Sub-Same Day centers are the key infrastructure for quick delivery of both everyday essentials and grocery, and so it’s no surprise that they are also among the fastest growing nodes in Amazon’s distribution network

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(12)制备Fmoc-Pro-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-树脂： (12) Preparation of Fmoc-Pro-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-resin: 在步骤(11)的Fmoc-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-树脂中，加入脱帽试剂10～50℃反应5～30分钟，用真空泵抽干，重新加入脱帽试剂10～50℃反应10～60分钟，抽干，用异丙醇洗涤3次，DMF洗涤3次，重蒸过的DMF洗涤2次，加入用DMF溶解的Fmoc-Pro-OH、DIEA、TBTU/HOBt或HBTU/HOBt或BOP/HOBt的混合物，10～50℃反应10～60分钟，用真空泵抽干，用异丙醇洗涤3次，DMF洗涤3次，重蒸过的DMF洗涤2次，抽干，获得Fmoc-Pro-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-树脂； In the Fmoc-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-resin in step (11), add the decapping reagent and react at 10～50°C 5 to 30 minutes, dry with a vacuum pump, re-add the decapping reagent at 10 to 50 ° C for 10 to 60 minutes, dry, wash with isopropanol for 3 times, DMF for 3 times, re-distilled DMF for 2 times, add Dissolve Fmoc-Pro-OH, DIEA, TBTU/HOBt or HBTU/HOBt or BOP/HOBt mixture in DMF, react at 10-50°C for 10-60 minutes, dry with vacuum pump, wash with isopropanol 3 times, DMF Washed 3 times, washed 2 times with re-distilled DMF, and dried to obtain Fmoc-Pro-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu- Val-resin