abstract |
The present invention, C 1-6 alkyl R 1 is optionally substituted, optionally C 3-7 cycloalkyl substituted, optionally is heterocyclyl optionally substituted with aryl or substituted; n is 0, And Y is —NR 18 S (O) u R 19 or a group shown below to provide a compound of formula (I): 1 or 2; |