abstract |
A method for treating diseases mediated by a P2X 3 and/or a P2X 2/3 receptor with compounds of the formula I: n n n n n n n n n n or a pharmaceutically acceptable salt thereof, wherein, R 1 is an optionally substituted thiazole, oxazole, isothiazole or isoxazole and X, R 2 , R 3 , R 4 , R 5 , R 6 , R a and R b are as defined herein. |