C[C@@]12C(=O)Nc3cc(Cl)ccc3C(=O)N1[C@H]1c3cc(Br)ccc3OC[C@@H]1[C@@H]2c1ccccc1
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?