摘要:
Quinoline derivatives represented by formula (I): ##STR1## wherein A-B-D represents --C(COO--Y).dbd.CH--C(OR).dbd. (wherein Y represents 8-methyl-8-azabicyclo[3.2.1]oct-3-yl group and R represents alkyl) or --C(OH).dbd.C(COX--Y)--CH.dbd. (wherein X represents --O-- or --NH--; and Y has the same meaning as described above), or a pharmaceutically acceptable salt thereof, possess potent 5HT.sub.3 antagonizing activity and are useful as antiemetic agents.
摘要:
A lens for an underwater camera is comprised of a first lens unit having no refractive power or having weak refractive power, a second lens unit comprising a forward unit having negative refractive power and a rearward unit having positive refractive power, and having weak refractive power, a third lens unit having positive refractive power, and a fourth lens unit having negative refractive power, the first lens unit being fixed relative to the image plane, the second lens unit and the third lens unit being axially moved together on the optical axis toward the object side relative to the fourth lens unit.
摘要:
There are disclosed s-triazolo[3,4-i]purine derivatives represented by formula: ##STR1## wherein Y-Z represents ##STR2## R.sub.4 represents hydrogen, alkyl, substituted or unsubstituted aromatic heterocyclic group or substituted or unsubstituted aryl; and X.sup.2 represents oxygen, sulfur or NH; each of R.sup.1 and R.sup.2 independently represents hydrogen, alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; R.sup.3 represents alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; X.sup.1 represents oxygen or sulfur; and represents a single bond or a double bond or pharmaceutically acceptable salts thereof.
摘要翻译:公开了由下式表示的三唑并[3,4-i]嘌呤衍生物:其中Y-Z表示R 4表示氢,烷基,取代或未取代的芳族杂环基或取代或未取代的芳基; X2表示氧,硫或NH; R 1和R 2各自独立地表示氢,烷基,环烷基,芳烷基或取代或未取代的芳基; R3表示烷基,环烷基,芳烷基或取代或未取代的芳基; X1表示氧或硫; 并且表示单键或双键或其药学上可接受的盐。
摘要:
Disclosed is a thienopyridine derivative represented by formula (I): ##STR1## wherein one of A and B represents --S-- and the other represents --CH.dbd.; X represents --O-- or --NH--; R.sup.1 represents hydrogen or lower alkyl; R.sup.2 represents lower alkyl; and n represents 0 or 1; or a pharmaceutically acceptable salt thereof.The thienopyridine derivative is useful as anti-emetics and suppressant of migraine.
摘要:
The present invention discloses a manufacturing method for polarization maintaining optical fiber couplers which are used for joining light signals and at optical fiber branch points. The disclosed manufacturing method employs polarization maintaining optical fibers, and describes a method for mutually aligning the stress applying parts of such optical fibers so that polarized optical signals are maintained in the polarized state when transiting such couplers.
摘要:
Novel imidazoquinolone derivative represented by formula (I); ##STR1## wherein R.sup.1 represents lower alkyl or --(CH.sub.2).sub.m CO--R.sup.3 where R.sup.3 represents hydrogen, lower alkyl, hydroxy or lower alkoxy; and m is an integer of 1 to 3; R.sup.2 represents lower alkyl; or a pharmaceutically acceptable salt thereof.
摘要:
Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, charaacterized by the addition of a starch ether derivative of a general formula (I): ##STR1## where St--O represents a starch molecule residue, R.sub.1, R.sub.2 and R.sub.3 independently represent an alkyl group having from 1 to 18 carbon atoms or a benzyl group, provided that two or more of these R.sub.1, R.sub.2 and R.sub.3 must not be a benzyl group or an alkyl group having from 5 to 18 carbon atoms at the same time, and any two of these R.sub.1, R.sub.2 and R.sub.3 may be bonded to form a cyclic structure, the said derivative containing the ether bond preferably in a degree of substitution of from 0.01 from 0.1, to the said papermaking stock in an amount of from 0.05 to 5.0% by weight of the cellulose fiber or the total of the said fiber and the inorganic filler in the said stock, as well as the said starch ether derivative of the formula (I) and a method for preparation of the said derivative.
摘要:
An electrostatic recording material comprising a substrate treated for low electric resistance and a dielectric layer formed on the substrate and composed of a composition comprising an insulating resin having a volume specific resistance of at least 10.sup.12 .OMEGA.cm and a powder of an acrylonitrile-type polymer having a copolymerized acrylonitrile content of at least 95% by weight and containing substantially no ionic groups, said powder having a volume average particle size of from 1.5 to 4 .mu.m and a content of particles having a size exceeding 8 .mu.m as measured by a particle size distribution measuring apparatus, being at most 0.02% by number.
摘要:
A printing system includes a first storage part storing printing partners correlated with respective predetermined printing fields and respective printing quality evaluation degrees; a second storage part storing distribution partners correlated with respective delivery quality evaluation degrees; a printing partner selecting part configured to select a single printing partner whose predetermined printing field matches a printing field to which a print ordered by a user corresponds and whose printing evaluation degree is the highest among the printing partners; a distribution partner selecting part configured to select a single distribution partner whose delivery quality evaluation degree is the highest among the distribution partners; and an order placing part configured to place, via an electrical network, an order for a printing service for printing the print to the single printing partner and an order for a delivery service for delivering the print to the single distribution partner.
摘要:
An optical system including, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; and a fourth lens group having negative refractive power. The second lens group has, in order from the object, a front group having negative refractive power and a rear group. In various embodiments, the following conditional expressions are satisfied, 0.4