C[N+](C)(C)CC(=O)N/N=C(/C(=O)Nc1ccc(Br)cc1)C1C(=O)NC(=O)NC1=O
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?