O=C1OCCN1C(=O)[C@H]1[C@H](c2ccc([N+](=O)[O-])cc2)C(c2cccc(Cl)c2)=NN1c1ccccc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?