CN1C(=O)N(C)C(=O)C2(Cc3cc(NC(=O)c4ccccc4Cl)ccc3N3CCCC32)C1=O
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?