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CRYSTALLINE D-ISOGLUTAMYL-D-TRYPTOPHAN AND THE MONO AMMONIUM SALT OF D-ISOGLUTAMYL-D-TRYPTOPHAN
CRYSTALLINE D-ISOGLUTAMYL-D-TRYPTOPHAN AND THE MONO AMMONIUM SALT OF D-ISOGLUTAMYL-D-TRYPTOPHAN
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机译:结晶D-异戊糖基-D-三苯乙胺和D-异戊糖基-D-三苯胺的单铵盐
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摘要
A process for making pure crystalline D-isoglutamyl-D-tryptophan is provided which includes the step of deprotecting essentially pure N-tert-butoxycarbonyl-D- isoglutamyl-D-tryptophan or its diester to yield essentially pure D-isoglutamyl-D- tryptophan. A process is also provided for the preparation of pure mono ammonium salt of D-isoglutamyl-D-tryptophan from essentially pure N-tert-butoxycarbonyl-D- isoglutamyl-D-tryptophan. D-isoglutamyl-D-tryptophan, ammonium salt (1 :1) is a stable pharmaceutical solid.
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