title: Preparation and stereoconfigurations of heterodimers of pyrimidines.
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D009690:Nucleic Acid Conformation; D011740:Pyrimidine Dimers / Q000138:chemical synthesis; D013941:Thymine; D014498:Uracil
chemical_list: D011740:Pyrimidine Dimers; D014498:Uracil; D013941:Thymine