title: Letter: Fluorine control of regioselectivity in photocycloaddition reactions. The direct functionalization of uracil via a novel 1,4-fragmentation.
mesh_terms: D003500:Cyclization; D005472:Fluorouracil; D010777:Photochemistry; D014498:Uracil
chemical_list: D014498:Uracil; D005472:Fluorouracil