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L-Tryptophan (22)CAS RN:73-22-3;80206-30-0
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PhytoTechnology LaboratoriesTelephone:+1-913-3415343
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AerChemTelephone:+1-812-334-9996
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George Uhe CompanyTelephone:+001-800-850-4075 001 201 843-4000
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Cambridge IsotopeTelephone:+1-978-749-8000
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Kyowa Hakko Usa, Inc.Telephone:+1-212-319-5353
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Scandinavian Formulas, Inc.Telephone:+1-215-4532507
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Advanced ChemTech Inc.Telephone:+1 (502)969-0000
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BHS MarketingTelephone:+1-801-973-8232
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Gallard-Schlesinger Industries Inc.Telephone:(516) 683-6900 or (800) 645-3044
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Genencor International, Inc.Telephone:650-846-7500