CCC(C)C(NC(=O)CNC(=O)C(Cc1ccccc1)NC(=O)C1CCCN1C(=O)c1ccc(-c2ccc(Cl)cc2Cl)o1)C(=O)OC
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?