COc1ccc(Br)cc1CNC(=O)c1cc2n(n1)CCCN(Cc1ccc(C)cc1)C2=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?