lactols

https://doi.org/10.1351/goldbook.L03438
  1. Cyclic @H02774@ formed by @I03130@ addition of a hydroxy group to an aldehydic or ketonic carbonyl group. They are thus 1-oxacy-cycloalkan-2-ols or unsaturated analogues, e.g.
    L03438.png
  2. [obsolete] This term has also been used for hydroxy @L03439@, but such use is not recommended.
Source:
PAC, 1995, 67, 1307.(Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1347 [Terms] [Paper]