O=C(O)C(SC1=NC(=O)C2(NN1)c1ccccc1-c1ccccc12)SC1=NC(=O)C2(NN1)c1ccccc1-c1ccccc12
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?