O=C(NN1C(=O)/C(=C/c2ccc(Cl)cc2)N=C1c1ccccc1)c1c(Cl)c(Cl)c(Cl)c(Cl)c1-c1nc2ccccc2[nH]1
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?