| abstract |
To provide a novel compound having a BTK inhibitory action and a cell growth inhibitory effect. The present invention also provides a medicament useful for the prevention and / or treatment of diseases involving BTK, particularly cancer, based on the BTK inhibitory action. A compound represented by formula (I) [wherein R 1 to R 3 , W, A, Y, and Z have the meanings defined in the specification] or a salt thereof. |