COMPOSITION PHARMACEUTIQUE CONTENANT UN COMPOSE ACTIF SUR LE PLAN OPTIQUE POSSEDANT UNE ACTIVITE D'AGONISTE DU RECEPTEUR DE LA THROMBOPOIETINE ET SON INTERMEDIAIRE
An optically active 4-phenylthiazole derivative having a thrombopoietinreceptoragonist activity and a pharmaceutical composition containing the presentcompoundas an active ingredient are created, and a platelet production regulatingagent whichcan be orally administered is provided.Disclosed is a pharmaceutical composition containing, as an active ingredient,an optically active compound represented by the formula:(see above formula)wherein, R1 is a halogen atom or C1-C3 alkyloxy； R2 is C1-C8 alkyl； R3 is C1-C8 alkyl；R4 and R5 are each independently a fluorine atom or chlorine atom； R6 is C1-C3alkylor C1-C3 alkyloxy； * indicates that a carbon atom marked with an asterisk isanasymmetric carbon, a pharmaceutically acceptable salt thereof, or a solvatethereof.
