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1670-50-4 suppliers list
Company Name: Beijing xinyanhui pharmaceutical research and development co., LTD  
Tel: 13969155946
Website: www.chemicalbook.com/showsupplierproductslist710437/0.htm
Company Name: Block Chemical Technology (Shanghai) Co., Ltd.  
Tel: 021-20432219 13918097649
Website: http://www.acblock-lab.com
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