摘要:
Caprazene and caprazol could be synthesized by hydrolysis of a caprazamycin. There could be synthesized a caprazene-1'''-amide derivative of the formula (II) and a caprazene-1'''-ester derivative of the formula (III) from caprazene. Further, there could be synthesized a caprazol-1'''-amide derivative of the formula (V) and a caprazol-1'''- amide-3'''-ester derivative and a caprazol-3'''-ester derivative, etc. from caprazol. Furthermore, an imidazolidinone derivative could be synthesized from the ring-opened product of the 1,4-diazepinone ring of caprazol. The novel caprazene derivative, novel caprazol derivative and novel imidazolidinone derivative now synthesized exhibit excellent antibacterial activities against a variety of bacteria, including acid-fast bacteria.
摘要:
There have been obtained, by cultivation of Streptomyces sp. MK730-62F2 (deposit number of FERM BP-7218), antibiotic caprazamycins A to F having by the following general formula (I) wherein R is tridecyl group, 11-methyl-dodecyl group, and others. These caprazamycins have excellent antibacterial activities against various acid-fast bacteria and various bacteria as well as their drug-resistant strains.
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:
5"-N-alkoxycarbonyl and 5"-N-aralkyloxycarbonyl derivatives of caprazene, said caprazene being the compound represented by the following formula (I)
摘要:
By culturing Lysobacter sp. BMK333-48F3 (Accession No. FERM BP-7477), antibiotics tripropeptin Z, tripropeptin A, tripropeptin B, tripropeptin C and tripropeptin D represented by general formula (I) are obtained as antibiotics showing an excellent antibacterial effect on bacteria and having a novel molecular skeleton, wherein R represents 7-methyl-octyl, 8-methyl-nonyl, 9-methyl-decyl, 10-methyl-undecyl or 11-methyl-dodecyl. These tripropeptins have an excellent antibacterial activity on various bacteria and drug-tolerant strains thereof such as methicillin-tolerant strains and vancomycin-tolerant strains.
摘要:
Delaminomycins A, B and C, represented by general formula (I) or (I'), or salts thereof, delaminomycins A2, B2 and C2, represented by general formula (II), and sulfates of delaminomycins A2 to C2, represented by general formula (III), or salts thereof. The delaminomycins selectively inhibit T cells, have the activity of inhibiting the growth of certain cancer cells, and are antibacterial.
摘要:
20,23-disubstituted mycaminosyltylonolide derivatives and use of the same in the field of the prophylaxis and treatment of pasteurellosis are disclosed. The di-substituents are peperidino optionally substituted with one or two methyl groups. The derivatives have selective antibacterial activity against Pasteurella.