CC(C)CNC(=O)N1[C@H](c2cccs2)[C@@H](C)C(=O)[C@@H](C)[C@@H]1c1cccs1
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?