CC(C)(C)NC(=O)CN(C(=O)Cn1nnc(-c2ccccc2F)n1)c1cccc2c1CCCC2
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?