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L-Tryptophan
73-22-3
Shandong Lanyuguang Chemical Co., Ltd
Jinzhou Jirong Amino Acid Co., Ltd.
Credokorea
The Apotex Group
Shantou Baokang Pharmaceutical Co., Ltd.
Anyang Criss Chemicals Co,.ltd.
Huang Shijie
Wuhan Zhongfu Bio-Tech Co., Ltd.
Shandong Airuike Chemical Co., Ltd.
Tianjin Tensing Fine Chemical Research Develop Centre