摘要:
Described is a process for producing a new immunosuppressant, a C-19/C-22 cyclic hemiketal (Compound I) biotransformation analog of FR-900520, under novel fermentation conditions utilizing the novel microorganism, Streptomyces sp. (Merck Culture Collection MA6963) ATCC No. 55230. The macrolide immunosuppressant is useful in preventing human host rejection of foreign organ transplants, e.g. bone marrow, liver, lung, kidney and heart transplants.
摘要:
Described is a process for producing a new immunosuppressant, a C-31 desmethyl, C-19/C-22 cyclic hemiketal biotransformation analog (Compound I) of FR-900520, under novel fermentation conditions utilizing the novel microorganism, Streptomyces, lavendulae ATCC No. 55209. Also disclosed is the C-31 methylated derivative (Compound II) of Compound I produced by enzymatic methylation using 31-O-desmethylimmunomycin O-methyl transferase, (DIMT), a methyl transferase enzyme. The macrolide immunosuppressants are useful in preventing human host rejection of foreign organ transplants, e.g. bone marrow, liver, lung, kidney and heart transplants.
摘要:
Incubation of 13.beta.-hydroxy ivermectin aglycone with a species of Bacillus subtilis or the incubation of 13-deoxy ivermectin aglycone with a mixed culture of a species of Bacillus subtilis and of Streptomyces griseus results in the production of 13-.beta. ivermectin monoglucopyranoside as the major product and of 5-.beta. ivermectin monoglucopyranoside as the minor product.
摘要:
Compounds of Structural Formula (I) ##STR1## are produced by directed biosynthesis. These compounds are squalene synthetase inhibitors and thus useful as cholesterol lowering agents, antifungal agents and cancer treatment agents.
摘要:
A compound of structural formula ##STR1## having antihypercholesterolemic utility is produced by culturing a Streptomyces sp. in a nutrient medium in the presence of a substrate of structural formula: ##STR2##
摘要:
Described is a new process for selectively acylating FK-506 type immunosuppressant macrolides, including immunomycin (FK-520), in the C-32 position, under novel conditions utilizing an immobilized lipase enzyme, an acyl donor, and a dry, non hydroxylic organic solvent. The enzyme is absorbed onto a solid support and the enzyme/support catalyzes the C-32 acylation. The enzyme/support complex can then be filtered from the reaction mixture and, recycled for use.
摘要:
Biotransformation products of a fermentation with culture MA7074 are potent HIV protease inhibitors. These products are useful in the prevention or treatment of infection by HIV and in the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.
摘要:
Described is a new microorganism, Actinoplanacete sp., (Merck Culture Collection MA 6559) ATCC No. 53771. The microorganism acts as a demethylating agent and can produce the new immunosuppressants, "demethomycin" (L-682,993) a C-31 demethylated analog of L-679,934, and "demethimmunomycin" (L-683,742) a C-31 demethylated analog of L-683,590, under novel fermentation conditions. These macrolide immunosuppressants are useful in preventing human host rejection of foreign organ transplants, e.g. bone marrow and heart transplants.
摘要翻译:描述了一种新的微生物Actinoplanacete sp。(Merck Culture Collection MA 6559)ATCC No.53771.微生物作为去甲基化剂,可以产生新的免疫抑制剂“吗啡霉素”(L-682,993)C-31去甲基化的类似物 的L-679,934和“demethimmunomycin”(L-683,742)L-683,590的C-31去甲基化类似物,在新的发酵条件下。 这些大环内酯类免疫抑制剂可用于预防异种器官移植的人宿主排斥反应。 骨髓和心脏移植。
摘要:
Fermentation of the microorganism Streptomyces sp. (MA6750) ATCC No. 55042 in the presence of the Angiotensin II (A II) receptor antagonist of the following structure: ##STR1## yields an analog having a shikimate sugar-like moiety attached to the tetrazole, the said analog which is also an A II antagonist useful in the treatment of hypertension and congestive heart failure and other indications known to respond to A II angatonists.
摘要:
Fermentation of the microorganism Streptomyces sp. (MA6750) ATTC No. 55042 in the presence of the Angiotensin II (A II) receptor antagonist ##STR1## yields three analogs, each having a shikimate sugar-like moiety attached to the tetrazole, which are also A II antagonists useful in the treatment of hypertension and congestive heart failure and other indications known to respond to A II antagonists.