Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Product profiles from the irradiations of 3-acetyl-5-methylisoxazole (4) and Z-3-azido-3-hexene -2,5-dione (5) were compared. Whereas both compounds gave rise to azirine 7, diacetylacetonitrile (6) was produced only from (4). ... Irradidation of the isoxyzole and vinyl azide shown ...