CS(=O)(=O)N1c2ccccc2[C@]2(Br)C[C@H]3C(=O)N[C@@H](Cc4ccccc4)C(=O)N3[C@H]12
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?