CN(C)C1(CNC(=O)C2CCN(S(=O)(=O)c3c(Cl)cccc3Cl)CC2)CCCCC1
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?