hydrazonic acids

https://doi.org/10.1351/goldbook.H02885
Compounds derived from @O04374@RkE(=O)l(OH)m (l ≠ 0) by replacing a double-bonded oxygen atom by =NNR2, as in carbohydrazonic acids, RC(OH)=NNH2 and sulfonohydrazonic acids, RS(=O)(=NNH2)OH.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1341 [Terms] [Paper]