CC(C)OC(=O)C1=C2c3ncccc3C(=O)N2[C@@H](Cl)[C@H](Cl)[C@H]1Cl
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?