Cyclic hemiacetal forms of @M04021@ in which the ring is six-membered (a tetrahydropyran).
See:
furanoses
,
monosaccharides
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1361 [Terms] [Paper]