Quinolines are an important class of biologically active heterocyclic compounds, and their derivatives usually exhibit a variety of biological activities. They can be used as antimalarial drugs and in the preparation of other antimalarial drugs. Other important activities of quinoline derivatives include inhibitory activity against EGFR-TK and antipsychotic activity. Futhermore, quinoline scaffolds are present in various drug molecules, including the antimalarial drugs aablaquine, chloroquine, mefloquine and primaquine, and the antibacterial agents gatifloxacin, levofloxacin, and moxifloxacin.
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Anthracene is a condensed aromatic hydrocarbon containing three rings. The center of the three rings of anthracene is in a straight line, which is the isomer of phenanthrene. The chemical activity of the 9 and 10 positions in the anthracene molecule is relatively high. It is oxidized with nitric acid to generate 9, 10-anthraquinone, which is an important intermediate for the synthesis of anthraquinone dyes. Anthracene can also act as a conjugated diene in a Diels-Alder reaction with maleic anhydride.