A variety of specific compounds within the scope of formula I which are useful as PI3K inhibitors and can be employed for the treatment of autoimmune diseases, inflammation, cardiovascular diseases, neurodegenerative diseases and tumours, and pharmaceutical compositions and kits containing said specific compounds.式I(式中、R、R1およびR2は、請求項1に示す意味を有する)の化合物は、PI3K阻害剤であり、とりわけ、自己免疫疾患、炎症、心血管病、神経変性病および腫瘍の処置のために用られ得る。