Chemistry is traditionally divided into organic and inorganic chemistry. COA of Formula: C5H5NO3, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 42831-50-5
Positron emission tomography has emerged as the leading method for medical imaging with fluorine-18 as the most widely used radioactive isotope. Here we report a semi-automated method for the preparation of valuable [ 18F]trifluoromethylcopper, as well as its use for the radiosynthesis of [18F]trifluoromethylarenes and heteroarenes. Mild conditions of [18F]trifluoromethylation make this method particularly useful for the radiosynthesis of pharmacologically relevant [18F] trifluoromethylarenes and heteroarenes. 18F Radiochemistry: A semi-automated method for the fast preparation of radiolabelled (trifluoromethyl)copper is reported (see scheme), thus making [ 18F]CuCF3 almost as accessible as [18F]fluoride itself for the preparation of radiolabelled trifluoromethylated probes. It can be used for the preparation of radiolabelled trifluoromethylarenes from arylboronic acids and aryliodides. This methodology is clean, efficient and consistent with the specific requirements of radiochemistry.
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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem