Cc1cccc(C(C)C)c1N1C(=O)C(=O)C(c2nc3ccccc3o2)C(=O)C1=O
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?