CCOC(=O)[C@H](C)OC(=O)[C@@](C)(NC(=O)c1ccccc1C(=O)OC)[C@@H]1NC=C(C(=O)OC)CS1
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?