COC(=O)C1=C(C(=O)OC)C(C(=O)c2ccc(Br)cc2)N2N=C(c3ccc(Cl)cc3)C=CC12
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?