57results about How to "To achieve the effect of increasing efficiency and reducing toxicity" patented technology

The invention discloses a 3,3'-methene-difluoroquinolone derivative of a chiral oxazine quinoline ring as well as a preparation method and application of the 3,3'-methene-difluoroquinolone derivative. The 3,3'-methene-difluoroquinolone derivative has a chemical general structural formula I shown in the specification, wherein R represents cyclopropyl or ethyl or fluoroethyl; R1 represents a hydrogen atom or methyl or ethyl; R2 represents a hydrogen atom or methyl; X represents a nitrogen atom or a hydrocarbon (CH) group or a fluoro-substituted carbon atom (F-C) or a methoxyl-substituted carbon atom (CH3O-C). The 3,3'-methene-difluoroquinolone derivative of the chiral oxazine quinoline ring, disclosed by the invention, can be used for realizing the superposition of a difluoroquinolone framework and alpha, beta-unsaturated ketone pharmacophores, so that the antitumor activity of a new compound is improved, the toxic and side effects on normal cells can be reduced, and the 3,3'-methene-difluoroquinolone derivative can be used as an antitumor active substance for developing an antitumor drug of a totally new structure.

The invention provides a plant raw material composition with an anti-fatigue effect, a preparation method, an application and a product thereof. The composition is prepared from the following in proportion: 20 to 80 percent of rhodiola rosea plants, 10 to 60 percent of gynostemma pentaphylla plants, and 10 to 60 percent of lycium plants. Auxiliary materials can be added into the composition to prepare health-care products, foods or anti-fatigue medicament. The medicament can obviously improve the fatigue symptom of fatigue people, and improve sleep quality without affecting human normal physiologic indexes. The medicament can improve the oxygen supply capability of a body, and plays a role of resisting fatigue by potentially improving the function of red blood cells and platelets. The medicinal composition uses small effective dosage, has good water solubility, and is suitable for preparing various preparations.

The invention discloses N-methyl gatifloxacin aldehyde thiosemicarbazone derivative and a preparation method and application thereof. The N-methyl gatifloxacin aldehyde thiosemicarbazone derivative has a chemical structural formula as a following formula I. In the formula I, substituent R is an H atom or alkyl or cyclopropyl with 1 to 5 carbon atoms. According to the N-methyl gatifloxacin aldehyde thiosemicarbazone derivative disclosed by the invention, combination of three kinds of advantage pharmacophore of a fluoroquinolone framework, imine Schiff base, thiourea and the like is achieved; thus, antineoplastic activity of novel compound is improved, a toxic and side effect of normal cells is reduced, and the N-methyl gatifloxacin aldehyde thiosemicarbazone derivative can serve as antineoplastic activity substance to develop antineoplastic drug with a novel structure.

The invention discloses a levofloxacin (rhodanine unsaturated ketone) amide derivative and a preparation method and an application thereof. The levofloxacin (rhodanine unsaturated ketone) amide derivative adopts the following chemical structural general formula I (shown in the specification); and in the formula I, Ar represents a benzene ring or a substituted benzene ring or a furan ring or a pyridine ring. On the basis of a medicine molecule construction strategy of pharmacophore splice, the levofloxacin (rhodanine unsaturated ketone) amide derivative disclosed by the invention implements superposition of four pharmacophores of a chiral tricyclic fluoroquinolone skeleton, amide, rhodanine and alpha, beta-unsaturated ketone, so that the antineoplastic activity of a new compound is improved, the toxic or side effects on normal cells are reduced, and the levofloxacin (rhodanine unsaturated ketone) amide derivative can be used as an antineoplastic active substance for developing an antineoplastic medicament of a brand-new structure.

The invention discloses an ofloxacin aldehyde thiosemicarbazone derivative, and a preparation method and an application thereof. A chemical structure general formula is as shown in the specification, wherein in the formula, R represents a hydrogen atom or alkyl or cyclopropyl of 1-5 carbon atoms. The ofloxacin aldehyde thiosemicarbazone derivative disclosed by the invention realizes the fusion of three advantageous pharmacophores, namely, tricyclic fluoroquinolone skeleton, schiff base imine and thiourea, thereby improving the antineoplastic activity of a new compound and reducing the toxic and side effects to normal cells, thus the ofloxacin aldehyde thiosemicarbazone derivative can be used as an antineoplastic drug of a brand-new structure developed for antineoplastic active substance.

The invention discloses a bis-fluoroquinolone thiadiazole ureas N-acetyl norfloxacin derivative and a preparation method and application thereof. The chemical structural general formula of the bis-fluoroquinolone thiadiazole ureas N-acetyl norfloxacin derivative is shown in the following formula I (shown in the specification), according to the formula I, R is ethyl or cyclopropyl or fluoroethyl oran oxazine ring formed with a C-8 position or a thiazine ring formed with the C-8 position, L is independent chlorine atom or fluorine atom or 1-piperazinyl or substituted piperazine-1-yl or a nitrogen fused heterocyclic ring, and X is hydrocarbon (CH) or nitrogen atom or fluorine-substituted carbon atom (F-C) or methoxy-group-substituted carbon atom (CH3O-C). According to the bis-fluoroquinolonethiadiazole ureas N-acetyl norfloxacin derivative and the preparation method and application thereof, organic combination of a bis-fluoroquinolone skeleton, the thiadiazole heterocyclic ring and functional group ureas is achieved, the charge transfer and superposition of different pharmacophore are further achieved, the anti-tumor activity and selectivity of fluoroquinolone are increased, toxic and side effects on normal cells are reduced, and the bis-fluoroquinolone thiadiazole ureas N-acetyl norfloxacin derivative can be used as anti-tumor active substances to develop anti-tumor drugs withbrand-new structures.

The invention discloses a Rufloxacin aldolase 4-aryl thiosemicarbazides derivative and a preparation method and an application thereof. The structural formula is shown in formula I in the specification, wherein Ar is phenyl, substituted phenyl, pyridyl, furyl or thienyl. The Rufloxacin aldolase 4-aryl thiosemicarbazides derivative has the advantages that the three types of superior pharmacophores of tricyclic fluoroquinolone keel, imine Schiff base and thiourea are compounded, so that the anti-tumor activity of a new compound is improved, and the toxic or side effect to normal cells is decreased; the derivative can be used as an anti-tumor active substance to develop an anti-tumor drug with a new structure.

The invention discloses N-methyl ciprofloxacin aldolase 4-aryl thiosemicarbazide derivative. A chemical structural formula of the N-methyl ciprofloxacin aldolase 4-aryl thiosemicarbazide derivative is shown in the specification, wherein a substituent group Ar is a benzene ring, a substituent benzene ring, a pyridine ring, a furan ring or a thiophene ring. The invention further discloses a preparation method and application of the N-methyl ciprofloxacin aldolase 4-aryl thiosemicarbazide derivative. The N-methyl ciprofloxacin aldolase 4-aryl thiosemicarbazide derivative disclosed by the invention achieves combination of three kinds of advantageous pharmacophore of fluoroquinolone keel, Schiff base imine and thiourea, so that antineoplastic activity of the new compound is improved, toxic and side effects on normal cells are reduced, and the N-methyl ciprofloxacin aldolase 4-aryl thiosemicarbazide derivative can serve as an antineoplastic activity material to develop antineoplastic medicine of a full-novel structure.