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BOC Sciences
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3B Scientific Corporation
847 281 9822
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Beijing Amino-Nonnatural Co., Ltd.
+86 1067147482
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[86] 2784232005
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86 21 6871 2331
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MRV:4,6-DIMETHYL-2-OXO-2H-PYRAN-5-CARBOXYLIC ACID.cml