pentoz

listen to the pronunciation of pentoz
التركية - الإنجليزية
pentose
A sugar or saccharide containing five carbon atoms

Ribose, found in RNA, is a common pentose.

any monosaccharide sugar containing five atoms of carbon per molecule
{i} monosaccharide that contains 5 carbon atoms (Chemistry)
They are not fermented by yeast
Any of a group of sugars of the formula C5H10O5, as arabinose; so called from the five carbon atoms in the molecule