| 摘要 |
NEW MATERIAL:A compound (salt) expressed by formula I (R<1> represents H or acyl; Rb<1> represents H, methyl, isopropyl, benzyl, etc.; R<2> and R<q> represent H, carboxyl, etc.; RD represents H, carboxyl, etc.; R<r> represents H or amino- protecting group; (m) is 1-3; (n) is 1-2; R<2> represents H, protected carboxyl, etc.) when R<1> represents H, tert-butoxycarbonyl, etc.; (m) is 2 and (n) is 1; R<2> represents H, protected carboxyl, etc.; when R<1> represents lactoyl, Rb<1> represents methyl, (m) is 2, (n) is 1, R<p> and R<q> represent carboxyl and R<r> represents H, R<2> represents H, carboxyl, etc.). USE:Useful as midicines having immunoresponse promoting action, reticuloendothelial system enhancing action, interferon-production activity, juvenilization activity, phylaxis effect, antitumor action, etc. PREPARATION:A compound expressed by formula II is reacted with a compound expressed by formula III to afford a compound expressed by formula IV (Rc<1> represents acyl; R1<p> represents H or protected carboxyl; R1<r> represents amino- protecting group). |
