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Process of resolving dl-acyl tryptophan compounds and products obtained thereby

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  • 5. IN A PROCESS OF RESOLVING N-ACYL-DL-TRYPTOPHAN COMPOUNDS, THE STEPS COMPRISING ADDINT TO AN N-LOWER ALIPHATIC ACYL-DL-TRYPTOPHAN COMPOUND IN A WARM SOLVENT L(+)-THREO-(1-P-NITRO PHENYL)-2-AMINO PROPANEDIOL-(1,3) IN AN AMOUNT SLIGHTLY IN EXCESS OF THE EQUIMOLECULAR AMOUNT, COOLING SAID SOLUTION TO COMPLETE PRECIPITATION OF THE DIFFICULTY SOLUBLE SALT OF SAID N-ACYL-LTRYPTOPHAN COMPOUND WITH SAID AMINO PROPANEDIOL COMPOUND, AND SEPARATING SAID SALT FROM THE MOTHER LIQUOR.
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