CC(C)(C)c1cc(NC(=O)C(=O)c2cccc3ccccc23)n(-c2ccc(OCC(N)=O)cc2)n1
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?