Cc1ccc(C(=O)C2=C(O)C(=O)N(Cc3cccnc3)C2c2cccc([N+](=O)[O-])c2)o1
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?