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Ctibor MAZAL. Stereoselective 1,3-dipolar cycloaddition of a nitrile ylide photochemically generated from 2,3-diphenyl-2H-azirine to substituted methylene lactones.
Collection of Czechoslovak Chemical Communications. Prague: Inst. Org. Chem. Bioch. Czech Acad. Sci., 2000, vol. 65, No 5, p. 708-716. ISSN 0010-0765.