C[C@H]1CN([C@@H](C)CO)S(=O)(=O)c2ccc(Br)cc2O[C@H]1CN(C)Cc1ccccc1
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?