C[C@@H](C(=O)OC1C[C@@H]2CC[C@H](C1)N2C)c1ccc(Br)cc1
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?