摘要:
This invention relates to the novel compounds 3',5,7-trihydroxy-4',6-dimethoxy-isoflavone, 3',5,7-trihydroxy-4',8-dimethoxy-isoflavone and 3',7-dihydroxy-4',6,8-trimethoxy-isoflavone which are powerful inhibitors of catechol-O-methyl transferase (COMT) and to their production by fermentation of Actinomyces roseolus.
摘要:
New antibiotic designated MF266 substance is now obtained from fermentaton of a new microorganism Streptomyces MF266-g4 (desposited under FERM-P 5401 or ATCC 31910). This new substance is useful as antibacterial agent and/or an antitumor agent for the inhibition of experimental animal tumors.
摘要:
Benanomicin A and Benanomicin B are fermentatively produced by the cultivation of a new microorganism Actinomadura spadix, designated as MH193-16F4 strain.
摘要:
New antitumor agents named aclacinomycins A and B, which are anthracycline glycosides and inhibit the growth of various microorganisms e.g., Staphylococcus aureus, Micrococcus flavus, Corynebacterium bovis and inhibit the growth of animal tumors such as leukemia L1210 and P388 and lymphoma 6C3HED in mice and hepatomas in rats are produced by the fermentation of a microorganism belonging to the genus Streptomyces which has been designated Streptomyces galilaeus (MA144-M1 and A.T.C.C. 31133); they are recovered from the broth by conventional methods for recovering antibiotics.
摘要:
This invention relates to the novel compounds 3',5,7-trihydroxy-4',6-dimethoxy-isoflavone, 3'5,7-trihydroxy-4',8-dimethoxy-isoflavone and 3',7-dihydroxy-4',6,8-trimethoxy-isoflavone which are powerful inhibitors of catechol-O-methyl transferase (COMT) and to their production by fermentation of Actinomyces roseolus.
摘要:
D-.beta.-Lysylmethanediamine represented by the formula (I) ##STR1## or a salt or a hydrate thereof has now been found to have an activity of inhibiting the infection with AIDS virus (a virus causative of acquired human immunodeficiency syndrome), mamely HIV. A pharmaceutical composition comprising the above compound or a salt or hydrate thereof as active ingredient is provided and expectable as one of remedial agents for treating AIDS which is now thought to be difficult to cure.
摘要:
L-aminoacylases S.sub.1 and S.sub.2 derived from actinomycetes and having physicochemical characteristics such that it is a L-aminoacylase which acts on a N-acyl-L-amino acid to give a L-amino acid, its substrate profile is wide, and it acts not only on a N-acyl derivative of a natural L-amino acid, but also on a N-acyl derivative of a synthetic L-amino acid, while it does not act on a N-acyl-D-amino acid, a DL-N-acetyl-.alpha.methylbenzylamine and a N-acetyl-D-glucosamine, etc.
摘要:
N-acyl-DL-3-(3,4-dihydroxyphenyl)serine or a catecholic hydroxyl-protected derivative thereof is stereospecifically de-acylated by reaction with a microorganism of the genus Streptomyces or Streptoverticillium having an acylase or with an extract of said microorganism containing said acylase, to produce L-3-(3,4-dihydroxyphenyl)serine or the hydroxyl-protected derivative thereof, with the N-acyl-D-3-(3,4-dihydroxyphenyl)serine compound remaining unaltered. The L-3-(3,4-dihydroxyphenyl)serine compound so produced can be separated from the N-acyl-D-3-(3,4-dihydroxyphenyl)serine compound owing to the difference in the properties of them.
摘要:
There is provided benzofuryl-&agr;-pyrone derivative represented by the following structural formula (I): wherein R1 represents a hydrogen atom or an alkyl group of 1 to 5 carbons; R2 represents hydrogen, —CO—R5 or —SO2R6; R3 represents hydrogen, an alkyl group of 1 to 5 carbons, etc.; and R4 is a substituent attached to the 4-carbon, 5-carbon, 6-carbon or 7 carbon of the benzofuran ring; and their salts. The compounds are useful as therapeutic agent for hypertriglyceridemia, lipid metabolism enhancers, or prophylactic and/or therapeutic agents for arteriosclerosis.
摘要:
20,23-disubstituted mycaminosyltylonolide derivatives and use of the same in the field of the prophylaxis and treatment of pasteurellosis are disclosed. The di-substituents are peperidino optionally substituted with one or two methyl groups. The derivatives have selective antibacterial activity against Pasteurella.