The present invention provides a compound that has an excellent inhibitory activity on STAT6 activation and is effective against allergic diseases, and a medicinal composition thereof. According to the present invention, disclosed is the compound represented by the General Formula (I) ##STR00001## [where R.sup.1 and R.sup.2 independently represent a C.sub.1-6 alkyl group and the like that may have a hydrogen atom or a substituent; R.sup.3 represents a C.sub.1-6 alkyl group and the like that may have a substituent; R.sup.4 and R.sup.5 independent represents a hydrogen atom or a C.sub.1-6 alkyl group and the like that may have a substituent; R.sup.6 represents a hydrogen atom and the like; W represents --SO.sub.2--and the like; and X represents a sulphur atom and the like.] or a salt thereof, or a hydrate thereof.

 
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