The present invention is directed to a compound represented by formula (1): ##STR00001## (wherein R.sup.1 represents an alkyl group which may have a substituent or an alkenyl group which may have a substituent; andeach of R.sup.2 and R.sup.3 represents a hydrogen atom, an alkyl group, a hydroxyalkyl group, a dihydroxyalkyl group, or an alkynyl group, or R.sup.2 and R.sup.3 form, together with the nitrogen atom adjacent thereto, a nitrogen-containing saturated heterocyclic group which may have a substituent) and a drug composition containing the compound. The compound exhibits tumor necrosis factor (TNF-.alpha.) production inhibitory effect and improved absorption upon oral administration.

 
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