CN(C(=O)c1cccc(NC(=O)Cc2cccc(NC(=O)C3CCCN(C(=O)CCc4ccccc4)C3)c2)c1)C1CCC1
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?