Synthesis of (4S)- and (4R)-methyl 2-amino-1-pyrroline-5-carboxylates and their application to the preparation of (4S)-(+)- and (4R)-(-)-dihydrokikumycin B

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• Fuxin Jintelai Fluorin Chemical Co., Ltd.

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• Yancheng Creator Chemical Co., Ltd

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• Changsha Huajing Powdery Material Technological Co., Ltd.

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• Nanjing Samwon International Limited

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