The crystal and molecular structure of 3-[(5S)-5-carboxy-2-oxotetrahydrofur-5-yl]-(2S)-alanine (lycoperdic acid)

Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
1978.0

Abstract

The crystal structure of a new dicarboxylic amino acid, isolated from the mushroom Lycoperdon perlatum, has been solved by direct methods and refined by full-matrix least squares to R = 0.059 for 930 independent reflexions measured on a diffractometer. Crystals of C₈H₁₁NO₆ are orthorhombic, space group P2₁2₁2₁, with a = 6.411 (2), b = 22.889 (5), c = 6.270 (2) Å, Z = 4. The folded conformation of the molecule is presumably related to the presence of an intramolecular N-H...O bond. Molecular packing is determined by a system of two N-H...O and one O-H...O intermolecular bonds.

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