摘要:
This invention relates to tricyclo compounds useful for treatment and prevention of resistance by transplantation, graft-versus-host diseases by medulla ossium transplantation, autoimmune diseases, infectious diseases, and the like, which can be represented by the following formula: ##STR1## to a process for their production, to a pharmaceutical composition containing the same and to a use thereof.
摘要:
Disclosed is a novel lipophilic macrolide of Formula I: ##STR1## The compound of assigned Formula I is an analog of rapamycin which has activity as an antifungal agent and as an immunosuppressant.
摘要:
A new antitumor antibiotic designated BMY-41950 is produced by fermentation of Streptomyces staurosporeus ATCC 55006 or Streptomyces hygroscopicus ATCC 53730. The BMY-41950 antibiotic exhibits both antimicrobial and antitumor activities.
摘要:
A compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represents hydrogen or methyl and X is ##STR2## provided that when R.sub.1 is hydrogen, R.sub.2 is hydrogen or methyl and X is ##STR3## and when R.sub.1 is methyl, R.sub.2 is methyl and X is ##STR4## is produced by cultivating a a microorganism belonging to the genus Streptomyces in a culture medium. Said compound is useful as an antimicrobial agent and so forth.
摘要:
New tylosin derivatives having at least one acyl group at the 3- and 4"-positions of tylosin, and the acid addition salts thereof, which inhibit the growth of various microorganisms including drug-resistant bacterial isolants and which produce high blood levels through oral administration are produced by a biochemical reaction using the microorganisms of the genus Streptomyces which are selected for their newly-found ability to acylate at least one of the 3- and 4"-positions of macrolide antibiotics; they are recovered from the reacted mixture by conventional methods for recovering macrolide antibiotics.