| 摘要 |
A compound having the formula <IMAGE> or a pharmaceutically acceptable salt thereof, wherein A is N-Ac-Sar, pGlu, or homo-pGlu-; B is an aryl group, a heteroaryl group, a cycloalkyl group, an aralkyl group, a heteroalkyl group, a heteroaralkyl group, a benzoyl group, an alkyl group, an acetyl group, or a substituted aryl group wherein the substituent is halogen, hydroxy, alkoxy, nitro, cyano, or hydroxyalkyl; E is H or an alkyl group; B and E being separate substituents or, together with C1 and the nitrogen atom to which B is attached, forming a 5,6, or 7-membered ring; m is an integer between 0 and 4; either F is <IMAGE> wherein R is an alkoxy group or an aralkoxy group; or F is <IMAGE> and is capable of forming a 6-membered ring with the nitrogen atom of A, provided that F can only be <IMAGE> forming a ring with A when A is pGlu or homo-pGlu.
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