摘要:
A 7.beta.-{(Z)-2-(2-aminothiazol-4-yl)-2-[(2-pyrrolidon-3-yl)oxyimino]acetamido}-3-(1-amino-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid or a pharmaceutically acceptable salt thereof is useful as an antimicrobial agent.
摘要:
A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl;R.sup.2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio, andR.sup.3 is carboxy; orR.sup.2 is a group of the formula ##STR2## R.sup.3 is --COO.sup.- and Y is hydrogen, hydroxymethyl or carbamoyl; andn is an integer of 2 or 3,or a pharmaceutically acceptable salt thereof and processes for their preparation are disclosed. Said cephalosporin compound is useful as an antimicrobial agent.
摘要:
A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl;R.sup.2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio, andR.sup.3 is carboxy; orR.sup.2 is a group of the formula: ##STR2## R.sup.3 is --COO.sup.- and Y is hydrogen, hydroxymethyl or carbamoyl; andn is an integer of 2 or 3,or a pharmaceutically acceptable salt thereof and processes for their preparation are disclosed. Said cephalosporin compound is useful as an antimicrobial agent.
摘要:
A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl;R.sup.2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio, andR.sup.3 is carboxy; orR.sup.2 is a group of the formula: ##STR2## R.sup.3 is --COO.sup.- and Y is hydrogen, hydroxymethyl or carbamoyl; andn is an integer of 2 or 3,or a pharmaceutically acceptable salt thereof and processes for their preparation are disclosed. Said cephalosporin compound is useful as an antimicrobial agent.
摘要:
A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl;R.sup.2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio, andR.sup.3 is carboxy; orR.sup.2 is a group of the formula: ##STR2## R.sup.3 is --COO.sup.- and Y is hydrogen, hydroxymethyl or carbamoyl; andn is an integer of 2 or 3,or a pharmaceutically acceptable salt thereof and processes for their preparation are disclosed. Said cephalosporin compound is useful as an antimicrobial agent.
摘要:
A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group, a carboxy(lower)alkyl group, a hydroxy(lower)alkyl group, a carbamoyl(lower)alkyl group, an N-(lower)alkyl-carbamoyl(lower)alkyl group, a cycloalkyl group, a carboxycycloalkyl group, or a tetrazolylmethyl group, R.sup.2 is a hydrogen atom, a lower alkyl group, a formyl group or a lower alkanol group, R.sup.3 is a hydrogen atom, or R.sup.2 and R.sup.3 are combined together to form an aralkylidene group, or a pharmaceutically acceptable salt thereof which is useful as an antimicrobial agent, and process for their preparation.
摘要:
A compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or hydroxy, R.sup.2 is a group of the formula: --CO-CH(NH.sub.2)-CH.sub.2 COR.sup.3 or --COCH.sub.2 -CH(NH.sub.2)-COR.sup.3, and R.sup.3 is selected from the group consisting of hydroxy, lower alkylamino, di-lower alkylamino, lower alkoxy and hydroxy-lower alkylamino, or R.sup.3 is amino when R.sup.2 is hydroxy. Several methods of preparing the compound [I] are also disclosed. The compound [I] and a pharmaceutically acceptable salt thereof are useful as antimicrobial agents.
摘要:
A quinoline compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or fluorine. A method of preparing the compound (I) is disclosed. The compound (I) and a pharmaceutically acceptable salt thereof are useful as antimicrobial agents.
摘要:
A fine carbon fiber having an outer diameter of about 1 to about 80 nm and an aspect ratio of 10 to 30,000, comprising a hollow center portion and a multi-layer sheath structure of a plurality of carbon layers, the layers forming annual rings, wherein the sheath-forming carbon layers form an incomplete sheath, i.e., the carbon layers are partially broken or disrupted in a longitudinal direction, and the outer diameter of the carbon fiber and/or the diameter of the hollow center portion are not uniform in a longitudinal direction. The carbon fiber is obtained by instantaneously reacting a carrier gas at a high temperature and an organic compound gas kept at a temperature below the decomposition temperature of the transition metal compound and has a conductivity equivalent to that of a conventional vapor phase method and is useful as a filler material in resins, rubbers, paints and the like.
摘要:
It relates to high purity single-walled carbon nanotubes having controlled diameter, useful as industrial materials, including high-strength carbon wire rods, particularly uniform single-walled carbon nanotubes having diameter fallen in a range of from 1.0 to 2.0 nm, and a method for producing the same efficiently, in large amount and inexpensively. The single-walled carbon nanotube obtained is characterized in that its diameter is fallen in a range of from 1.0 to 2.0 nm, and an intensity ratio IG/ID between G-band and D-band in a Raman spectrum is 200 or more. Furthermore, those single-walled carbon nanotubes are synthesized by a gas-phase flow CVD method that uses a saturated aliphatic hydrocarbon which is liquid at ordinary temperature as a first carbon source and an unsaturated aliphatic hydrocarbon which is gas at ordinary temperature as a second carbon source.