C[C@H](O)[C@@H]1C(=O)N2CCc3c([nH]c4ccccc34)[C@@H]2C[C@@H]1N(C)C(=O)c1cc(Cl)cc(Cl)c1
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?