O=C1C=C(c2ccccc2)C[C@H](c2cccs2)[C@H]1n1nnc([N+](=O)[O-])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?