O=[N+]([O-])c1cc(Cl)c(O)c(-[n+]2c(-c3ccccc3)cc(-c3ccccc3)cc2-c2ccccc2)c1.[O-][Cl+3]([O-])([O-])[O-]
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?