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        1. The company has achieved ISO9001-2008 quality management system certification; ISO14001-2004 environmental management system certification;
          Beijing Chengyu Specialty Chemical Co., Ltd. Beijing Chengyu Specialty Chemical Co., Ltd. English
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          ADD:Shilou Town, Fangshan District, Beijing
          Indole and its derivatives
          Quinoline and its derivatives
          Imidazole and its derivatives
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          Products name CAS Rn Chemical structure Order
          E001 E001 172616-80-7 E001 Order
          E002 E002 E002 Order
          E003 E003 E003 Order


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