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DL-Tryptophan
54-12-6
Jiangsu SOHO International Group Corp., China.
Zhangjiagang Shuguang Biological Factory
Wuxi Shengbaoluo Bio-Tech Co., Ltd.
Nanjing Ruizhi Industry & Technologh Co.,Ltd.
Melrob-Chemiplus Limited
Qiude Biochemical Engineering Co.,Ltd.
Grandachem Ltd.
Wuhan Zhongfu Bio-Tech Co., Ltd.
POLCHEM HYGIENE LABORATORIES PVT. LTD
ANHUI PUHE INTERNATIONAL CO., LTD.