| 摘要 |
Compounds of the formula <IMAGE> wherein Ar is phenyl or naphthyl, X is oxygen or the group <IMAGE> Y is substituted or unsubstituted alkylene of 1-4 carbon atoms, R1 is acyloxy, acyloxyalkoxy, acylamino or is -N(Alkyl)(Acyl, R4 is hydrogen or lower alkyl, R5 is hydrogen, lower alkyl or acyl, and R2, R3, R6 and R7 are the same or different and are hydrogen, halogen, hydroxy, lower alkoxy, acyloxy, amino, alkylamino, dialkylamino, acylamino, nitro, lower alkyl, lower halogeno alkyl, or lower alkylthio, ACYL IN THESE RADICALS BEING DERIVED FROM [A] SATURATED OR UNSATURATED, STRAIGHT, OR BRANCHED, SUBSTITUTED OR UNSUBSTITUTED FATTY ACIDS OF 2-10 CARBON ATMS, [B] SUBSTITUTED OR UNSUBSTITUTED BENZOIC ACIDS, [C] LOWER ALIPHATIC MONO ESTERS OF CARBONIC ACID, OR [D] THE CARBONIC ACID PHENYL MONO ESTER; AND PHARMACEUTICALLY ACCEPTABLE SALTS OF THESE COMPOUNDS; OPTICALLY ACTIVE ISOMERS THEREOF AND DIASTEREOMERS.
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