CC(NC(=O)OC(C)(C)C)C(=O)Oc1cc2oc(=O)cc(-c3ccccc3)c2cc1Cl
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?