2,4-Dioxo-4-substituted-1-butanoic acid derivatives of the formula: ##STR1## where R is hydrogen or C.sub.1-4 alkyl; and L is a lipophilic group consisting essentially of: ##STR2## where R.sup.1 and R.sup.2 are each independently selected from the group consisting of (a) hydrogen; (b) C.sub.4-12 straight or branched chain alkyl; (c) C.sub.4-7 cycloalkyl; and (d) tetrahydronaphthyl; provided that R.sup.1 and R.sup.2 may not both be hydrogen; and when one of R.sup.1 or R.sup.2 is tetrahydronaphthyl, the other must be some other substituent; and that positions 2 and 6 of the substituted phenyl moiety may not be substituted; and ##STR3## where R.sup.1, and R.sup.2 have the same meaning as above except tetrahydronaphthyl; R.sup.3 is bromine, chlorine, or fluorine; m is 0 to 3; or a pharmaceutically acceptable salt thereof.
公式为:##STR1##其中,R为氢或C.sub.1-4烷基;L为一个亲脂性基团,基本上由以下组成:##STR2##其中,R.sup.1和R.sup.2各自独立选择自以下组:(a)氢;(b)C.sub.4-12直链或支链烷基;(c)C.sub.4-7环烷基;和(d)四氢
萘基;但是要求R.sup.1和R.sup.2不能同时为氢;当R.sup.1或R.sup.2之一为四氢
萘基时,另一个必须是其他取代基;并且取代苯基的2和6位不能被取代;以及##STR3##其中,R.sup.1和R.sup.2的含义与上述相同,除了四氢
萘基;R.sup.3为
溴、
氯或
氟;m为0到3;或其药学上可接受的盐。