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The title crystal structure, C11H18N4O3, is the first diazo­acetamide in which the diazo­acetyl group is attached to an N atom. The piperazine ring is in a chair form and hence the mol­ecule has an extended conformation. Both ring N atoms are bonded in an essentially planar configuration with the sum of the C-N-C angles being 359.8 (2) and 357.7 (2)°. In the crystal structure, the O atom of the diazo­acetyl group accepts two H atoms from C-H donors, thus generating chains of weak hydrogen-bonded R21(7) rings.
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