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L-Tryptophan
73-22-3
Shandong Lanyuguang Chemical Co., Ltd
Wuhan Zhongfu Bio-Tech Co., Ltd.
Shandong Airuike Chemical Co., Ltd.
Tianjin Tensing Fine Chemical Research Develop Centre
Atom Scientific Ltd
Vega Pharma Chemicals
Avantor Performance Materials, Inc.
Feedway Europe NV
Yixing Jiangshan Bio-tech Co., Ltd. (formerly Yixing Jiangshan Chemical Industry Factory)
Xi'an Yinherb Bio-Tech Co., Ltd.