摘要:
A phosphonate nucleotide compound having antiviral activity and is useful for an orally available and highly safe antiviral agent, which is represented by the following formula (I): ##STR1## wherein R.sup.1 represents hydrogen, a C.sub.1 -C.sub.6 alkoxy, a halogen-substituted C.sub.1 -C.sub.4 alkoxy, halogen, amino, or nitro; R.sup.2 and R.sup.3 independently represent hydrogen, a C.sub.1 -C.sub.22 alkyl, an acyloxymethy, an acylthioethyl, or a halogen-substituted ethyl; R.sup.4 represents hydrogen, a C.sub.1 -C.sub.4 alkyl, a C.sub.1 -C.sub.4 hydroxyalkyl, or a halogen-substituted C.sub.1 -C.sub.4 alkyl; and X represents carbon or nitrogen.
摘要:
Antiviral agents which comprises as active ingredients one or more 2',3'-dideoxyribonucleosides or phosphoric esters thereof and 6-benzyl-1-ethoxymethyl-5-substituted uracil derivative of the formula (I): ##STR1## wherein X is oxygen or sulfur atom; R.sup.1 is ethyl or isopropyl; R.sup.2 and R.sup.3 are independently hydrogen atom, C.sub.1 -C.sub.3 alkyl or halogen atom, which compounds can inhibit HIV reverse transcriptase through different mechanisms and are synergistic in combination.
摘要:
A compound represented by the following general formula (I) which has an antiviral activity: wherein R1 represents hydrogen atom, C1-C6 alkyl group, or C7-C10 aralkyl group; R2 represents C1-C6 alkyl group, C7-C10 aralkyl group, or phenyl group; R3 and R4 independently represent hydrogen atom, C1-C6 alkyl group, acyloxymethyl group, acylthioethyl group, or ethyl gorup substituted with at least one halogen atom; R5 represents hydrogen atom, C1-C4 alkyl gorup, C1-C4 hydroxyalkyl group, C1-C4 alkyl group substituted with at least one halogen atom; and X represents carbon atom or nitrogen atom.
摘要:
A phosphonate nucleotide compound represented by formula (I): (wherein R1 is a C1-C6 alkyl group or the like, R2 is a hydrogen atom, a C1-C4 alkyl group substituted by one or more halogen atoms or the like, R3 is a hydrogen atom, a C1-C4 alkyl group substituted by one or more halogen atoms or the like, R4 is a hydrogen atom, a C1-C4 alkyl group substituted by one or more halogen atoms and X is a carbon atom or a nitrogen atom), a salt thereof, a hydrate thereof or a solvate thereof, as well as a medicament containing the same. It is useful as an antiviral agent for human immunodeficiency virus, herpes simplex virus, hepatitis B virus or the like and as an antitumor agent.
摘要:
There is provided an ICG-loaded polymer nanoparticle that is dynamically stable, prevents the leakage of contained ICG and the resulting discoloration, and has a high molar absorbance coefficient. The particle contains a hydrophilic dye having a sulfonate group and a hydrophobic polymer, and the particle further contains at least one of a lipid having a positively charged region, a nicotinic acid derivative and a thiamine derivative.
摘要:
A method of detecting a contrast agent for photoacoustic imaging provides a high signal intensity. In a contrast agent for photoacoustic imaging, each particle containing an inorganic material supports at least an organic dye having an absorption coefficient in the near infrared region by means of chemical bonding.
摘要:
An electrophoretic display device executes a display on the basis of dispersing charged particles in a liquid and moving the charged particles under application of an electric field. The device includes a first substrate having an electrode, a film mounted on the first substrate and forming a closed portion with a surface of the first substrate, and a liquid positioned in the closed portion, with charged particles being dispersed in the liquid.
摘要:
A method of manufacturing an electron-emitting device that has an electroconductive film containing an electron-emitting region disposed between a pair of device electrodes includes a process of forming the electroconductive film by the steps of (a) applying a metal-containing solution, and (b) heating the solution. The metal-containing solution comprises a compound containing an organic acid group, a transition metal and an alcohol amine, and water.
摘要:
The invention relates to an acid tin-silver alloy plating bath which comprises tin ions, silver ions, one compound selected from the group consisting of aromatic thiol compounds and aromatic sulfide compounds, substantially non-cyanide and a balance of water, the pH of the bath being not higher than 2. According to this acid bath, tin and silver can be kept dissolved in the bath in a stable state for a long period of time even at a high temperature and a predetermined plating capacity is kept for a long period of time even though the bath is free from cyanide.
摘要:
A liquid crystal device is constituted by a pair of substrates each having thereon an electrode and a uniaxial alignment film, and a chiral smectic liquid crystal disposed between the substrates. At least one of the uniaxial alignment films is a film comprising an electroconductive polymer doped with at least two species of dopants, which preferably include a first type dopant capable of dedoping into the liquid crystal due to electric field application or diffusion, and a second type dopant substantially incapable of dedoping into the liquid crystal. The resultant liquid crystal device is alleviated with respect to voltage hysteresis and is suitable for gradational display.