摘要:
Novel antibiotics derivatives 7-(5-acylamido-5-carboxyvaleramido)-3-(.alpha.-methoxy-p-acyloxycinnamoyloxymethyl)-7-methoxy-3-cephem-4-carboxylic acids and the salts thereof which are useful as antibiotics and intermediates for the preparation of cephamycin derivatives, a process for preparing the same, and a process for recovering the cephamycin derivatives effectively and stably from the fermentation broth in the form of an N-acyl derivative.
摘要:
A new antibiotic designated as SF-1623 substance exhibiting a useful antibacterial activity against gram-negative bacteria is now produced by cultivating a new strain ATCC 21999 of the known species Streptomyces chartreusis. The SF-1623 substance in the form of its an alkali metal salt may be recovered from the culture when the cultivation is effected under aerobic conditions in the presence of an alkali metal thiosulfate.
摘要:
A new antibiotic designated as SF-1623 substance exhibiting a useful antibacterial activity against gram-negative bacteria is now produced by cultivating a new strain ATCC 21999 of the known species Streptomyces chartreusis. The SF-1623 substance in the form of its an alkali metal salt may be recovered from the culture when the cultivation is effected under aerobic conditions in the presence of an alkali metal thiosulfate.
摘要:
A novel antibiotic substance SF-1540 and a process for preparing the same which comprises culturing a substance SF-1540-producing microorganism belonging to the genus Streptomyces in a medium and isolating and recovering the substance SF-1540 from a cultured broth; a novel derivative of the substance SF-1540 and a process for preparing the same which comprises treating said antibiotic substance SF-1540 with methanol to form the corresponding antibiotic substance SF-1540 derivative.
摘要:
Novel 7-(5-amino-5-carboxyvaleramido)-7-methoxy-3-hydroxymethyl-3-cephem-4-carboxylic acid derivatives. Such derivatives are prepared by subjecting cephamycin type compounds to the action of esterase enzyme of mold fungi.
摘要:
D-Gluconic-.delta.-lactam is obtained by oxidizing nojirimycin with glucose-oxidizing enzymes or by the action of microorganisms capable of producing glucose-oxidizing enzymes.
摘要:
An antibiotic SF-1942 substance produced by cultivating an SF-1942 substance producing strain of the genus Streptomyces in a nutrient medium under aerobic conditions to produce and accumulate the SF-1942 substance in the nutrient medium and isolating the SF-1942 substance from the fermentation broth followed by purification and a process for the production of the antibiotic SF-1942 substance. The SF-1942 substance is effective as an antimicrobial agent and an antitumor agent against Sarcoma 180 tumor cells in mice.
摘要:
A BN-109 substance producing strain of the genus Bacillus is cultivated under an aerobic condition to produce and accumulate BN-109 substance in a culture medium. The BN-109 substance is isolated from the culture broth and purified, and proved to be a novel antibiotic. The BN-109 is effective in the treatment and prevention of swine scours.
摘要:
5-Substituted picolinic acid derivatives represented by the formula (I): ##STR1## wherein R.sub.1 represents a straight or branched chain halogen-substituted alkyl group having 2 to 6 carbon atoms or a substituted phenyl group having the formula ##STR2## wherein R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, an amino group, an N-alkyl-substituted amino group, an acylamino group, an acetyl group, an acyloxy group, a hydroxy group or a halogen-substituted alkyl group or R.sub.3 and R.sub.4, when taken together, represent a polymethylene chain; and R.sub.2 represents an --OM group wherein M represents a hydrogen, sodium, potassium, calcium, aluminium or magnesium atom, a straight or branched chain or cyclic alkoxy group having 1 to 6 carbon atoms, an aminoalkoxy group, a phenoxy group, a substituted phenoxy group, a 5-indanyloxy group, an acyloxyalkyloxy group having the formula ##STR3## wherein R.sub.5 represents a hydrogen atom or a methyl group and R.sub.6 represents a lower alkyl group having 1 to 6 carbon atoms, a phenyl group or a substituted phenyl group, or an amino group represented by the formula ##STR4## wherein R.sub.7 and R.sub.8, which may be the same or different, each represents a hydrogen atom, a lower alkyl group, or a phenyl group which are useful as anti-hypertensive agents, a process for preparing the above 5-substituted picolinic acid derivatives, and anti-hypertensive compositions containing the same.
摘要:
Novel cephalosporin derivatives having formulae (V) and (III): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.8 and A are defined as in the specification.