O=C(Nc1ccc(Cl)cc1)[C@@H]1[C@@H]2C(=O)N(c3ccc4ccccc4c3)C(=O)[C@@H]2[C@H]2C=CC=NN12
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?