O=C(CC(=O)n1nc(-c2ccccc2)c(/N=N/c2ccc([N+](=O)[O-])cc2)c1-c1ccccc1)Nc1ccc(Cl)cc1
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?