N-Benzyl-3,5-dide-oxy-3,5-imino-1,2-O-isopropyl-idene-ß-l-lyxofuran-ose.

X-ray crystallography confirmed the formation, structure and relative stereochemistry of the title compound, C(15)H(19)NO(3), which contains a sterically congested four-membered azetidine ring system. The absolute configuration was determined by the use of l-arabinose as the starting material.