https://doi.org/10.1351/goldbook.F02559
Cyclic hemiacetal forms of @M04021@ in which the ring is five-membered (i.e. a tetrahydrofuran skeleton).
F02559.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1336 [Terms] [Paper]