COC(=O)CCC(=O)OC1(C)C(=O)C2=CN(c3ccc(OC)cc3)C(c3ccc(OC)cc3)=CC2=C(Br)C1=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?