CC1=C(C(=O)O)N2C(=O)[C@@H](NC(=O)C(N)C3=CCC=CC3)[C@H]2SC1
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?