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Acta Crystallographica Section E

Structure Reports Online

Volume 64, Part 2 (February 2008)

organic compounds

Acta Cryst. (2008). E64, o436    [ doi:10.1107/S1600536808000640 ]

Cyclo(L-tyrosyl-L-tryptophanyl) dimethylformamide solvate

C. H. Görbitz and L. M. Hartviksen

Abstract: The structure of the title compound [systematic name: (3S,6S)-3-(4-hydroxybenzyl)-6-(1H-indol-3-ylmethyl)piperazine-2,5-dione dimethylformamide solvate], C20H19N3O3·C3H7NO, contains hydrogen-bonded tapes typical for diketopiperazines. The structure is stabilized by strong intermolecular interactions of the types O-H...O and N-H...O involving the dipeptide and the solvent molecules. The absolute configuration was known from the starting materials.

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