O=C1CN2C(c3ccccc3)=NN(c3ccc([N+](=O)[O-])cc3)C2(c2ccccc2)c2cc(Cl)ccc2N1CC1CC1
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?