Piperazine is an organic compound consisting of a six-membered ring containing two nitrogen atoms in opposite positions in the ring. The chemical formula of piperazine is C4H10N2, and it is an important pharmaceutical intermediate. Pyrimidines and piperazines are known to be the backbone of many bulk compounds and important core structures for approved drugs; studies have shown that combining a pyridine ring with a piperazine moiety within a single structural framework enhances biological activity.
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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Benzene is an important organic compound with the chemical formula C6H6, and its molecule consists of a ring of 6 carbon atoms, each with 1 hydrogen atom. Benzene is a sweet, flammable, colorless and transparent liquid with carcinogenic toxicity at room temperature, and has a strong aromatic odor. It is insoluble in water, easily soluble in organic solvents, and can also be used as an organic solvent itself. The ring system of benzene is called benzene ring, and the structure after removing one hydrogen atom from the benzene ring is called phenyl. Benzene is one of the most important basic organic chemical raw materials. Many important chemical intermediates can be derived from benzene through substitution reaction, addition reaction and benzene ring cleavage reaction.
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