摘要:
Disclosed are novel 2'-alkylidenepyrimidine nucleoside derivatives represented by formula [I]: ##STR1## wherein R.sup.1 is an amino gorup or a hydroxy group, R.sup.2 is a hydrogen atom, a halogen atom or a lower alkyl group, R.sup.3 is a hydrogen atom or a lower alkyl group, and R.sup.4 is a hydrogen atom or a phosphate residue, or salts thereof.These novel compounds can be produced from uridine or cytidine derivatives by alkylidenating the 2'-position in the sugar moiety thereof with Wittig's reagent.Furthermore, the compounds have remarkable antiviral activities and therefore can provide novel antiviral agents.
摘要:
Disclosed are novel 2'-alkylidenepyrimidine nucleoside derivatives represented by formula [I]: ##STR1## R.sup.1 is an amino group or a hydroxy group, R.sup.2 is a hydrogen atom, a halogen atom or a lower alkyl group, R.sup.3 is a hydrogen atom or a lower alkyl group, and R.sup.4 is a hydrogen atom or a phosphate residue, or salts thereof. These novel compounds can be produced from uridine or cytidine derivatives by alkylidenating the 2'-position in the sugar moiety thereof with Wittig's reagent. Furthermore, the compounds have remarkable antiviral activities and therefore can provide novel antiviral agents.
摘要:
Disclosed are novel 2'-alkylidenepyrimidine nucleoside derivatives represented by formula [I]: ##STR1## wherein R.sup.1 is an amino group or a hydroxy group, R.sup.2 is a hydrogen atom, a halogen atom or a lower alkyl group, R.sup.3 is a hydrogen atom or a lower alkyl group, and R.sup.4 is a hydrogen atom or a phosphate residue, or salts thereof.These novel compounds can be produced from uridine or cytidine derivatives by alkylidenating the 2'-position in the sugar moiety thereof with Wittig's reagent.Furthermore, the compounds have remarkable antiviral activities and therefore can provide novel antiviral agents.
摘要:
A 2-alkynyladenosine represented by general formula [I]: ##STR1## wherein n is an integer of from 2 to 15, has been found to have excellent properties as an antihypertensive agent. On the basis of this finding, the present invention has provided an antihypertensive agent comprising an antihypertensive effective amount of a compound of the above formula [I] and a pharmaceutically acceptable carrier. The present invention also discloses a novel compound 2-alkynyladenosine of formula [I] shown above wherein n is 6 to 15.
摘要:
A pharmaceutical composition for injection comprising a depsipeptide antibiotic, WAP-8294A2, as an active ingredient, which is stable and contains WAP-8294A2 in high concentrations is provided. This composition comprises WAP-8294A2 of the following structural formula (1) as an active ingredient and is characterized in that 2-hydroxypropyl-β-cyclodextrin or β-cyclodextrin is contained as a stabilizer or solubilizer and the pH of the composition is not adjusted. This composition is mixed with a pH-adjusting agent such as dextrose and with an infusion or diluent comprising a solution of disodium hydrogen phosphate, sodium dihydrogen phosphate, and sodium hydroxide at the time of use to prepare a solution for intravenous administration of WAP-8294A2.
摘要:
The present invention concerns an improved cooking utensil for keeping warm and cooking which comprises an inner vessel portion, an outer shell portion having an inside diameter larger than that of the inner vessel portion and a height as same as or longer than that of the inner vessel portion, said outer shell portion having a cylindrical shape, and a lid which closes an opening of the inner vessel portion, and a space portion being defined by said inner vessel portion and said outer shell portion, said inner vessel portion and said outer shell portion being combined or connected by a pair of hand grips.
摘要:
An object to be measured for the amount of movement thereof has a uniformly periodic structure. The object is illuminated with divergent light emitted from a coherent spot light source. By positionally adjusting the spot light source, the object, and a light sensor, an enlarged shadow-picture-like diffraction pattern of the uniformly periodic structure is generated at a position in which the light sensor is disposed. The shadow-picture-like diffraction pattern is moved when the object is moved across the divergent light from the spot light source. The amount of movement of the shadow-picture-like diffraction pattern is detected by the light sensor for thereby measuring the amount of movement of the object.
摘要:
1-.beta.-D-arabinofuranosyl-(E)-5-(2-halogenovinyl)uracil-5'-phosphates of the formula (I): ##STR1## and wherein X is halogen, pharmaceutically acceptable salts thereof, are produced by phosphorylation of the non-phosphorylated precursors of the compounds (I), and are useful as anti-viral agents.
摘要:
The present invention provides a novel purine 4'-thioarabinonucleoside represented by the following formula �1!: ##STR1## wherein B represents a purine base other than adenine. Also disclosed are a method for preparing the purine 4'-thioarabinonucleoside and pharmaceutical compositions containing the purine 4'-thioarabinonucleoside.
摘要:
A converter for raising a weak input DC voltage of 0.3 volts or less to an output voltage has a blocking oscillator and a field-effect transistor included in the oscillator. The transistor having a base earthed is of the enhancement type activated by a gate-source voltage equal to or lower than the input, and the oscillator is activated responding to the gate-source voltage, so that pulses are generated as the output. Typically, the oscillator is composed of a resistor and a condenser connected in series through a lead and between an earth and an input line, a transformer whose secondary winding is connected to transistor's gate and the lead, with a primary winding being connected to the input line and the transistor's drain, and a diode earthed and having a cathode connected to the gate. An electromotive force induced through the secondary winding when the transistor is inactivated has positive and negative poles directed to the condenser and the gate, respectively.