In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Computed Properties of C5H6N2O3, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1123-49-5, name is 3,5-Dimethyl-4-nitroisoxazole. In an article，Which mentioned a new discovery about 1123-49-5
The title compound is used to prepare 3-arylglutaric acids, bis-isoxazoles and bis-pyrazoles from commercially available materials. The methodologies described have afforded important synthetic intermediates in high yields and without the use of chromatography.
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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem