摘要:
Caprazene-1"'-ester derivatives of the formula (III)
wherein Me is methyl group, R 2 is a straight chain or a substantially straight chain alkyl group of 5-21 carbon atoms or a straight chain or a substantially straight chain alkenyl group of 5-21 carbon atoms or an alkynyl group of 5-21 carbon atoms and A is hydrogen atom or an amino-protecting group which is an alkoxycarbonyl group or an aralkyloxycarbonyl group, or a pharmaceutically acceptable acid addition salt thereof. The novel caprazene derivatives exhibit excellent antibacterial activities against a variety of bacteria including acid-fast bacteria.
摘要:
Preventives and remedies for ulcerous colitis and/or Crohn's disease containing as the active ingredient conagenin or a pharmaceutically acceptable salt thereof and having prominent therapeutic effects and a high safety.
摘要:
D-β-Lysylmethanediamine represented by formula (I) or a salt or hydrate thereof has an activity of inhibiting the infection with AIDS virus or HIV, and hence an AIDS virus infection inhibitor containing the same as an active ingredient is prospective as one of the remedies for AIDS which is thought to be difficult to cure.
摘要:
2'-Deoxy-2'-fluorocoformycin and 2'-deoxy-8-epi-2'-fluorocoformycin have now been synthesized by a multistage reaction via 3,5-di-O-benzoyl-2-deoxy-2-fluoro-α- and -β-D-ribofuranosyl bromide. Also 2'-deoxy-2'-epi-2'-fluorocoformycin and 2'-deoxy-8,2'-diepi-2'-fluorocoformycin have been synthesized from 3,5-di-O-benzoyl-2-deoxy-2-fluoro-α-D-arabinofuranosyl bromide by a multistage reaction. These four 2'-fluorocoformycin derivatives are novel compounds and have a potent enzyme inhibiting activity against adenosine deaminase. In particular, they are useful for treating acute lymphocytic leukemia in virtue of the above activity. Other novel compounds also obtained include various intermediates useful for the synthesis of the above derivatives.