organic compounds
Open access
In the title compound, C16H12Cl2O3, the benzene rings form a dihedral angle of 2.0 (3)°. Within the central O=C—CH2C(H)OH—C=O unit, the carbonyl groups are coplanar and lie to opposite sides [O—CC—O = −170.1 (6)°]. In the crystal, intermolecular O—HO hydrogen bonds formed between the hydroxy groups lead to a supramolecular chain along the c axis. In addition, the crystal packing features some very weak C—Hπ interactions.
organic compounds
Open access
The title compound, C19H20N4O4, is a cyclonucleoside with a C—N linkage. The furanose ring adopts a twist C3′-endo/C2′-exo (close to 3T2) conformation with a pseudorotational phase angle (P) of 8.1° and puckering amplitude (vm) of 30.6°. The orientation of the pyrimidine ring with respect to the sugar group is anti. One intramolecular C—HO hydrogen bond is observed. The packing features an N—HO hydrogen bond.