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L-Tryptophan
73-22-3
Shandong Lanyuguang Chemical Co., Ltd
Surechemical Co
Tongzhou Chengxin Amino Acid Co., Ltd.
Europepta GmbH
Shenyang Hongjiuzhou Chemical Co., Ltd.
KYOWA HAKKO Co., Ltd.
XI'AN ZHONGSHI BIOENGR CO.,LTD.
HANGZHOU GRNE BIOLOGICAL TECHNOLOGY CO., LTD.
Hebei Shunxing Import And Export Co.,Ltd
Karlan Research Products Corporation