title: The structural study of internal [2+2] photodimers of the derivatives of 1,1'-trimethylene-bis-(5-fluoro) uracil.
abstract: The structure of internal [2+2] photodimers of 1,1'-trimethylene-bis-(5-fluoro) uracil derivatives has been studied. All investigated compounds have cis-syn geometry with puckered endocyclic cyclobutane ring and chair-like conformation of 1,3-diazacycloheptane ring.
mesh_terms: D005472:Fluorouracil / Q000031:analogs & derivatives*; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009690:Nucleic Acid Conformation; D010777:Photochemistry; D011789:Quantum Theory; D013329:Structure-Activity Relationship
chemical_list: D005472:Fluorouracil