CCN1C(=O)C2(SC(NC(C)=O)=NN2C(C)=O)c2cc(C)cc(C)c21
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?