Cc1nn(-c2ccccc2)c2c1C(c1ccc([N+](=O)[O-])cc1)N1C(=N2)C(=O)Nc2ccccc21
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?