CCc1cccc2c1NC(=O)[C@]21[C@@H]2C(=O)N(Cc3ccccc3)C(=O)[C@@H]2[C@@H]2CCCN21
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?