semioxamazones

Compounds having the structure R2C=NNHC(=O)C(=O)NH2, formally derived from the condensation of aldehydes or ketones with semioxamazide (the hydrazide of oxamic acid), H2NNHC(=O)C(=O)NH2.
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1365