摘要:
The invention relates to the components of primycin antibiotic complex and the salts thereof and to the process for the separation of the individual components by chromatography. A further object of the invention is a synergistic antimicrobial composition containing the said components and a process for the preparation thereof.
摘要:
The invention relates to antibacterial pseudo-primycin complexes of formula (I) ##STR1## to the components and acid addition salts thereof, as well as to the preparation of these compounds and to the pharmaceutical compositions containing said compounds as active ingredient.In the formula (I) R.sup.1 is butyl, pentyl or hexyl, R.sup.2 is hydrogen, hydroxyl or O-arabinose and X is organic or inorganic acid ion.
摘要:
The invention relates to antibacterial pseudo-primycin complexes of formula (I) ##STR1## to the components and acid addition salts thereof, as well as to the preparation of these compounds and to the pharmaceutical compositions containing said compounds as active ingredient.In the formula (I) R.sup.1 is butyl, pentyl or hexyl, R.sup.2 is hydrogen, hydroxyl or O-arabinose and X is organic or inorganic acid ion.
摘要:
The invention relates to a new and simple process for the preparation of quinoline-carboxylic acid derivatives of the general formula (I) ##STR1## as well as hydrates and therapeutically acceptable salts thereof. In the formula the meaning of the substituents is as follows:R is hydrogen atom or a formyl group,R.sup.1 is a hydrogen atom or a straight or branched chain alkyl group having 1 to 4 carbon atoms, which may be substituted by a hydroxyl group, a halogen atom or an amino group; or a CH.sub.3 --NH-group,R.sup.2 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.According to the invention the compound of the general formula (II) ##STR2## or an acid addition salt thereof is reacted with piperazine in dimethylformamide and--if desired--the compound of the general formula (III) ##STR3## thus obtained is subjected to an acidic or alkaline treatment, or is reacted advantageously with hydrazine or preferably with hydrazine-hydrate.
摘要:
The invention relates to antibacterial pseudo-primycin complexes of formula (I) ##STR1## to the components and acid addition salts thereof, as well as to the preparation of these compounds and to the pharmaceutical compositions containing said compounds as active ingredient.In the formula (I) R.sup.1 is butyl, pentyl or hexyl, R.sup.2 is hydrogen, hydroxyl or O-arabinose and X is organic or inorganic acid ion.
摘要:
The invention relates to a synergistic, antimicrobial pharmaceutical composition containing 0.01 to 50% by weight of a quinolinecarboxylic acid derivative or a naphthyridinecarboxylic acid derivative of the formula (I), ##STR1## wherein X is carbon or nitrogen;R.sup.1 is hydrogen or fluorine;R.sup.2 is methyl, piperazino or methylpiperazino group; orR.sup.1 and R.sup.2 together are a methylenedioxy group; and 0.01 to 95% by weight of a tetracycline derivative of the formula (II), ##STR2## wherein R.sup.3 and R.sup.4 are hydrogen; orR.sup.3 and R.sup.4 together represent an additional chemical bond,in 20:1 to 1:50 ratio of the compound of the formula (I) to the compound of the formula (II), optionally in an admixture with an amount required to 100% by weight of an inert, solid or liquid carrier such as magnesium carbonate, magnesium stearate, starch, talc, cyclodextrine or water and other additives such as filling, disintegrating, sliding and emulsifying agents.
摘要:
The antibiotic primycin synergizes the effect of other antibiotics when used together therewith in amounts such that the primycin constitutes 5 to 50% by weight of the total antibiotic content.
摘要:
A pulsed fiber laser and associated electronics contained in a miniature package is disclosed. The Pulsed Fiber Laser Source (PFLS) can be a single-stage high gain master oscillator power amplifier (MOPA) type fiber laser source. The PFLS can include a distributed feedback (DFB) laser, a narrowband optical filter, a broad area high-power pump diode, and Erbium/Ytterbium (Er/Yb) double cladding doped fiber. Input electrical pulses drive the DFB laser diode to emit optical pulses that are then amplified by the optical amplifier. Active and passive cooling elements may be incorporated for continuous operation without rest time. Passive cooling for intermittent pulsed applications allows the laser source to be miniaturized by eliminating active cooling elements and associated power supplies and controllers. Low duty cycle relaxes drive requirements and further reduces the size. The PFLS can be used for long distance ranging, communication by retro-modulation, and communication in presence of atmospheric attenuation.
摘要:
The invention relates to a process for the preparation of water soluble primycin and to the separation of its components of formulae (A.sub.1) and (A.sub.3) either as single components or as a mixture of the two components. According to the invention(i) water insoluble primycin is reacted in a C.sub.1-3 alcohol with a condensable substance comprising a C--C--C bridge in the presence of sodium or potassium methoxide or ethoxide, the resulting product with a water solubility of 40-60 mg/ml is separated, and, if desired,(ii) the resulting substance is subjected to column chromatography on silica gel applying a 1% aqueous solution of Partridge mixture as eluting agent to obtain a mixture of components of formulae (A.sub.1) and (A.sub.3) with a water solubility of 50 mg/ml, and, if desired,(iii) the resulting two-component mixture is subjected to ion exchange chromatography applying carboxymethyl cellulose in ammonium cycle as adsorbent and eluting the adsorbent with aqueous ammonium hydrocarbonate solution to obtain the component of formula (A.sub.3) with a water solubility of 50 mg/ml in pure form, and, if desired,(iv) elution is continued with absolute methanol comprising 10 mmoles of acetic acid to obtain the component of formula (A.sub.1) with a water solubility of 10 mg/ml in pure form.