1-(1-Carboxymethyl-1,4-anhydro-2,3-O-isopropylidene-α-d-erythrofuranosyl)thymine

Abstract

X-Ray crystallography unequivocally determined the stereochemistry of the thymine base in the title compound, C14H18N2O7. The absolute stereochemistry was determined from the use of d-ribose as the starting material. There are two independent molecules in the asymmetric unit (Z′ = 2) which exist as N—H...O hydrogen-bonded pairs in the crystal structure.