摘要:
Fermentation broths or impure solutions containing thienamycin, a substance having antibiotic activity against gram-negative and gram-positive microorganisms, are purified using a sequence of ion exchange resins, starting with an anion exchange resin of the polystyrene-trimethylammonium type in the HCO.sub.3 -cycle, and ending with absorption on and elution from a polymeric cross-linked polystyrene-type resin adsorbent. Variations in the intermediate steps, e.g. different resins and eluates are possible and are illustrated within.
摘要:
Zaragozic acids isolated from a culture of MF5465 have been subjected to photoreaction, then derivatized at the 4-keto position. The resulting derivatives are active as squalene synthetase inhibitors and are useful in the treatment of hypercholesterolemia.
摘要:
Described is a process for producing a new FK-506 antagonist agent, a C-21 hydroxylated analog of FR-900520 under novel fermentation conditions utilizing the novel microorganism, Streptomyces hygroscopicus (Merck Culture Collection MA 6832) ATCC No. 55166. The macrolide antagonist is useful in preventing and/or counteracting accidental or inadvertent FK-506 overdosage in an FK-506 therapeutic program designed to prevent autoimmune diseases or human host rejection of foreign organ transplants, e.g. bone marrow, liver, lung, kidney and heart transplants.
摘要翻译:描述了在新型发酵条件下利用新型微生物吸水链霉菌(Streptomyces hygroscopicus)(Merck Culture Collection MA 6832)ATCC No.555166生产新的FK-506拮抗剂,FR-900520的C-21羟基化类似物的方法。大环内酯拮抗剂 可用于预防和/或抵制在FK-506治疗计划中意外或无意的FK-506过量剂量,其旨在防止自身免疫性疾病或人类宿主排斥外来器官移植,例如 骨髓,肝,肺,肾和心脏移植。
摘要:
Non-ionic, lipophilic substances are isolated from aqueous or aqueous-organic solution by treatment with a macroreticular polymeric absorbent followed by elution with additional or a different organic solvent.