The solid-state conformation of the title compound, C20H32N2O9, has been de
termined at 150 K. The pyranose ring has a distorted chair conformation. Am
ong the possible conformations of the C-N glycosidic bond, that of the E ro
tamer is observed and a short intramolecular C-methyl. . .O contact may par
tly stabilize this conformation. Crystal cohesion is stabilized by an exten
sive network of weak C-H . . .O hydrogen bonds and close contacts.