Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C4H8O2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 453-20-3
A convenient preparation of alpha-halo enamines using oxalyl halides is described together with applications of these reagents in the halogenation of beta-hydroxy cyclic ethers and lactones.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem