diosphenols

https://doi.org/10.1351/goldbook.D01749
Cyclic α-diketones, which exist predominantly in an enolic form.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1332 [Terms] [Paper]