The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure as an organic electroluminescent material, an organic electroluminescent device having long lifespan characteristics can be provided.

An extended-release topiramate capsule that includes a capsule shell containing a single population of coated particles; wherein each coated particle includes a core and a coating thereon; wherein each particle core includes a homogeneous mixture comprising topiramate throughout its core; and wherein the coating includes one or more release controlling agent(s).

The invention provides compounds represented by the formula (1)

##STR00001##

wherein X and Y are oxygen atoms or sulfur atoms, Z is a hydroxyl group or the like, R.sup.1 is a hydrogen atom or the like, R.sup.2, R.sup.3 and R.sup.4 are hydrogen atoms and the like, and R.sup.5 and Q are substituted phenyl groups and the like, or salts thereof, pest control agents containing the compounds as active ingredients, and methods for use thereof.