xylopyranose
Xylopyranose is the six-membered ring (pyranose) form of xylose, an aldopentose that occurs widely in plants. In solution, xylose exists in equilibrium with its open-chain form and with ring forms, including both the pyranose and the furanose forms. Xylopyranose can adopt two anomeric configurations at C1: alpha and beta. For the naturally occurring D-xylose, the principal forms are alpha-D-xylopyranose and beta-D-xylopyranose.
Structure and stereochemistry: The pyranose ring is formed by cyclization between the aldehyde group at C1
Occurrence and biology: Xylopyranose residues are components of xylan, the major hemicellulose in plant cell walls.
Uses and relevance: Xylopyranose serves as a reference sugar in carbohydrate analysis and as a building block