| 摘要 |
Compounds of the structure: <IMAGE> wherein R1, R2, R3, R4, R5, and R6 are hydrogen, alkyl, alkenyl, alkynyl, phenyl-alkyl, or cycloalkyl, n is an integer from 0 to 4 inclusive, M is heterocyclic or heterocyclic alkyl, Y is hydroxy, alkoxy, amino, or substituted amino, amino-alkanoyl, aryloxy, aminoalkoxy, or hydroxyalkoxy, and R7 is hydrogen, alkanoyl, carboxylalkanoyl, hydroxyalkanoyl, amino-alkanoyl, cyano, amidino, carbalkoxy, <IMAGE> wherein Z is hydrogen, alkyl, hydroxyalkyl, aminoalkyl or the radical <IMAGE> wherein R1, R2, R3, R4, R5, R6, n, M and Y are as described above; and where Y is hydroxy their nontoxic, pharmaceutically acceptable alkali metal, alkaline earth metal, and amine salts.
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