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Spectroscopic and crystallographic data for the title compound (4S,5R)-4-amino-5-methyl-3-isoxazolidinone, C4H8N2O2.0.5H2O, are reported. The title compound crystallizes with one half equivalent of water in a zwitterionic structure stabilized by intermolecular hydrogen bonds.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks cyclothreonine, global

hkl

Structure factor file (CIF format)
Contains datablock AB1493

CCDC reference: 129508

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