CSCCC(N/C=C1\C(=O)NC(=O)N(c2ccc(Br)cc2)C1=O)C(=O)OC(C)(C)C
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?