CCN1C(=O)C2(C(C(=O)c3cc4ccccc4o3)=C(O)C(=O)N2CCCN(C)C)c2ccccc21
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?