摘要:
The present invention provides a chemical compound having the structure being one selected from a group consisting of wherein R1 is one selected from a group consisting of COOCH3, COOCH2Ph, CONHCH(CH3)2 and CONHC6H5, R2 is one selected from a group consisting of H, CH3 and CH(CH3)2, R3 is one selected from a group consisting of H, CH3, CH(CH3)2 and CH2Ph, and R4 is one of CH(CH3)2 and C6H5.
摘要:
The invention is directed to novel compounds of Formula I: as well as its stereoisomers and/or pharmaceutically acceptable salts, for the treatment of diabetes and diabetes associated dyslipidemia.
摘要:
This invention is directed to functionalized higher diamondoids having at least one functional group. Preferably these derivatives have the following Formula I: wherein D is a higher diamondoid nucleus and wherein R1, R2, R3, R4, R5 and R6 are independently selected from a group consisting of hydrogen and functional groups, provided that there is at least one functional group on the derivative. The functionalized higher diamondoid compounds may also be of the formula D—L—(D)n wherein D is a higher diamondoid nucleus and L is a linking group and n is 1 or more. The functionalized higher diamondoid compounds additionally may be of the formula R38—D—D—R39 wherein D is a higher diamondoid nucleus and R38 and R39 are substituents.
摘要:
In a triterpenic acid having hydroxyl groups, at least one of the hydroxyl groups is phosphorylated to produce a phosphorylated triterpenic acid and/or a salt thereof, thereby improving the solubility of the triterpenic acid in a preparation for external application for the skin and allowing the physiological activity of the triterpenic acid to be exerted satisfactorily. The phosphorylated triterpenic acid is preferably, for example, ursolic acid phosphate and/or a salt thereof. The preparation for external application for the skin is preferably a cosmetic, particularly preferably a quasi-drug.
摘要:
A method of efficiently extracting a high-purity stereoisomer from a mixture comprising the endo isomer and the exo isomer of a dicarboxylic acid having a norbornene or norbornane structure, or a derivative thereof. The present invention relates to a method of separating the endo isomer and the exo isomer of a dicarboxylic acid represented by a general formula (1) or (2) or a derivative thereof, and includes the step of stirring and mixing a mixture comprising mainly the endo isomer of the dicarboxylic acid represented by the general formula (1) or (2) or a derivative thereof, and the exo isomer of the dicarboxylic acid represented by the general formula (1) or (2) or a derivative thereof, with a basic compound and a solvent. (wherein, R1 to R8 represent a hydrogen atom, methyl group, ethyl group, or butyl group), (wherein, R′1 to R′10 represent a hydrogen atom, methyl group, ethyl group, or butyl group).
摘要:
In the presence of an imide compound (e.g., N-hydroxyphthalimide) shown by the formula (2): wherein R1 and R2 independently represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group; or R1 and R2 may bond together to form a double bond or an aromatic or non-aromatic ring; Y is O or OH and n=1 to 3; or the imide compound and a co-catalyst (e.g., a transition metal compound), an adamantane derivative having a functional group such as a nitro group, an amino group, a hydroxyl group, a carboxyl group, a hydroxymethyl group and an isocyanato group is oxidized with oxygen. According to the above method, an adamantane derivative having a hydroxyl group together with a functional group such as a nitro group, an amino group, a hydroxyl group, a carboxyl group, a hydroxymethyl group and an isocyanato group is efficiently obtained.
摘要:
Accordingly the present invention provides an improved and economical process for the isolation of oleanolic acid from the roots of Lantana camara, which comprises of drying, grinding and defattening of Lantana camara roots with light petroleum followed by over night extractions at room temperature (30-40° C.) three times with a single solvent selected from CH2Cl2, CHCl3, EtOAc, ether, acetone, MeOH, EtOH etc., removal of solvent under vacuum at 35-45° C., precipitation of crude extract and repeated partial crystallization of precipitate with a single solvent selected from CH2Cl2, CHCl3, EtOAc, ether, acetone, MeOH, EtOH, H2O and others resulting in the isolation of oleanolic acid with 1% yield.
摘要:
A thin film comprising a discotic compound having diacetylene groups at the side chain moiety thereof, and a compound represented by formula (1): ##STR1## wherein R.sup.2 represents an alkyl group or an aryl group.