Clc1ccc(C2=C3CCCCn4c(-c5ccccc5)c[n+](c43)C2)cc1.[Br-]
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?