The present invention provides novel compounds having a P2X3 and/or P2X2/3 receptor antagonistic effect, e.g. a compound of Formula (I): wherein R2 is a hydrogen atom or the like； ring A is five- to seven-cycloalkane or the like； C is a carbon atom； Q1 and Q2 are carbon atoms or the like； R9a and R9b are carbon atoms or the like； R6 is cycloalkyl or the like； R7 is a group represented by the formula: wherein ring D is benzene or the like； carbon atom a and b are carbon atoms； ring B is an aromatic carbocyclic ring or the like； s and s&prime； are 0 or the like； R9 and R9&prime； are halogen or the like, or the like, or its pharmaceutically acceptable salt.
