O=C(C1CC(=O)N(c2ccccc2)C1)N1CCN(C2=NS(=O)(=O)c3ccccc32)CC1
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?