CN1OC[C@@H]2CN[C@H](c3ccc(-c4ccc(C#N)cc4)cc3)C[C@@H]21
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?