CC1(C)CC(=O)C2=C(C1)N1C(=C(C#N)C2c2ccc(Cl)cc2)N=C(N)c2ccccc21
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?