摘要:
New anthracycline compounds, 2-hydroxyaclacinomycin B having potent antitumor activity and lower toxicity, and a process for producing 2-hydroxyaclacinomycins A, B, and N by fermentation.
摘要:
The novel compound represented by the general formula (I) ##STR1## (wherein R represents a hydrogen atom, an alkanoyl group of 1 to 14 carbon atoms, or an arylcarbonyl group), and an acid addition salt thereof [on condition that when R is a hydrogen atom, the hydrochloride exhibits an optical rotation of [.alpha.].sub.D.sup.22 -1.degree. .+-.2.degree. (c, 2 water)] has antitumor activity in experimental animals.
摘要:
L-Argininal derivatives of the general formula: ##STR1## are disclosed. A method of manufacturing any such derivative is also disclosed. The L-argininal derivative of this invention has a strong inhibitory activity on proteases, such as serine and thiol proteases, and is expected to provide useful medicines, including those which are effective for diseases caused by abnormal elevation of protease activity.
摘要:
A substance having antibiotic activity, designated as cytophagin, which is stable in the form of colorless powder and which has an elemental analysis of H: 6.94%, C: 47.22% and N: 13.21%, a molecular weight of 1,000 to 1500. This substance is believed to be composed of 11 amino acids and exhibits a strong activity against Gram-positive bacteria. Cytophagin is produced by fermentation using a microorganism belonging to the genus Cytophaga and capable of producing cytophagin. A preferred strain is Cytophaga BMF 694-N3 (FERM P-4846;NRRL B-12109). Cytophagin is of potential interest as medicament or veterinary agent because of its antibiotic activity.
摘要:
New anthracycline compounds, 2-hydroxyaclacinomycin A having potent antitumor activity and lower toxicity, 2-hydroxyaklavinone as an useful precursor for producing anthracycline glycosides, and a process for the production thereof by microbial conversion method are disclosed.
摘要:
Disclosed is 3'-deamino-3'-morpholino-carminomycin, a new anthracycline glycoside having both antimicrobial and antitumor activity. Also disclosed is a new N-alkylation procedure for preparing the above compound as well as the known anthracyclines, 3'-deamino-3'-morpholino-adriamycin and 3'-deamino-3'-morpholino-daunomycin, in high yield.
摘要:
The invention is to provide a new process for producing daunomycin and baumycins having potent antitumor activity and low toxicity by microbial conversion of anthracyclinones such as aklavinone and .epsilon.-rhodomycinone.
摘要:
New anthracycline derivatives, 1-hydroxy-13-dihydrodaunomycin and N-formyl-1-hydroxy-13-dihydrodaunomycin are produced by microbial transformation of .epsilon.-pyrromycinone and .epsilon.-isorhodomycinone with daunomycin-producing streptomyces and their mutants. The derivatives herein are useful as cancer chemotherapeutic agents.
摘要:
New anthracycline glycosides designated MA 144-G1, -G2, -L, -S1, -N1, -U1 and -Y which inhibit the growth of gram-positive bacteria and mammalian tumors are produced by fermentation of certain species of Streptomyces and by the chemical or enzymatic conversion of certain anthracycline glycosides. New microbiological and chemical processes are also provided for preparation of the anthracycline glycosides MA 144-S2 and -U2 which have been found to be identical with the previously reported anthracyclines, marcellomycin and musettamycin.
摘要:
A new compound having the formula ##STR1## and now designated forphenicinol is produced, which exhibits an immunopotentiating activity. This new compound as well as its pharmaceutically acceptable salts and hydrates are useful for immunotherapy and treatment of immune diseases and disorders in living animals, including human beings. The new compound can be produced by hydrolysis of the corresponding aminonitrile compound of the formula ##STR2## or by reduction of forphenicine.