摘要:
New 3-[N-(mercaptoacyl)]amino-4-arylbutanoic acid derivatives are now provided, which exhibit analgesic activity and are effective to enhance the analgesia induced by a known analgesic compound, ]D-ala.sup.2,met.sup.5 ]-enkephalin (DAME).
摘要:
New 3-N-acyl derivatives of 3-amino-2-hydroxy-4-phenylbutanoic acid are provided, which exhibit analgesic activity and are affective to enhance the morphine analgesia.
摘要:
A new analgesic agent is now provided, which comprises as the active ingredient 3-amino-2-hydroxy-4-phenylbutanoic acid and some related compounds thereof. These compounds have now found to be effective as inhibitor against enkephalinase and as an agent for enhancing analgesic activity of morphine.
摘要:
3-Amino-2-hydroxy-4-phenylbutanoic acid and esters thereof as well as new derivatives thereof which are related to bestatin in their chemical structure are active to enhance the immune response in living animals.
摘要:
3-Amino-2-hydroxy-4-phenylbutanoic acid and esters thereof as well as new derivatives thereof which are related to bestatin in their chemical structure are active to enhance the immune response in living animals.
摘要:
Known compound, optically active arphamenine A can now be synthesized in an optically active pure form and in a favorable yield by a new process comprising consecutive steps with starting from L-arginine, wherein racemization of intermediate reaction products can be minimized.
摘要:
A 5-phenylthiazole derivative represented by the formula: ##STR1## wherein R represents a hydrogen atom, a lower alkyl group, a hydroxyl group, an amino group or a mercapto group, or a pharmaceutically acceptable salt thereof shows a cardiac effect and a low toxicity to a human or animal with little influence on atrium rhythms.
摘要:
A new and useful 1-N-[(S)-.alpha.-hydroxy-.omega.-aminoacyl] derivative of an aminoglycosidic antibiotic, including its deoxy derivative, such as kanamycin B, 3'-deoxyneamine, 3',4'-dideoxyneamine, 3',4'-dideoxyribostamycin or 3',4'-dideoxykanamycin B is now synthetized from the parent substance, aminoglycosidic antiobiotic. The new 1-N-[(S)-.alpha.-hydroxy-.omega.-aminoacyl] derivative shows a wider and/or higher antibacterial activity than the parent substance and is useful in the treatment of infections by gram-negative and gram-positive bacteria, including drug-resistant strains thereof. The preparation of this new derivative may be made by 1-N-acylating the parent aminoglycosidic antibiotic with (S)-.alpha.-hydroxy-.omega.-aminocarboxylic acid with the amino group being protected, and chromatographically separating the acylated products to isolate the desired 1-N-acyl derivative, followed by the removal of the amino-protecting group.
摘要:
A new cyclic ureido-derivative of a deoxystreptamine-containing antibiotic represented by the general formula: ##SPC1##Wherein R.sub.a, R.sub.b and R.sub.c stand for the residues present in the molecule of said antibiotic other than the deoxystreptamine moiety thereof is produced.
摘要:
2'-Modified kanamycins, including 2'-deoxykanamycin A, 2'-epikanamycin A and 2'-epikanamycin B, as new compounds are produced starting from kanamycin A by consecutive reaction steps. These new compounds are useful as antibacterial agent.