COc1ccc(C2Sc3ccccc3N(CCN(C)C)C(=O)[C@@H]2OC(C)=O)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?