CCC1Cc2c(nc3c4c(nc(N5CCOCC5)c(C#N)c24)NC(C)=N3)O1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?