O=C(O)c1ccc2c(c1)C1C(Cl)C(Sc3ccccc3[N+](=O)[O-])CC1C(c1cccc([N+](=O)[O-])c1)N2
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?