COC(=O)[C@H]1C=NN[C@@H]1C(=O)N1[C@H]2C[C@H]3CC[C@@]2(CS1(=O)=O)C3(C)C
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?