CN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](C1CC1)N1C(=O)CN(Cc3ccccn3)C(=O)[C@@]21Cc1ccccc1
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?