COc1ccc(-c2cn3c([n+]2-c2c(C)n(C)n(-c4ccccc4)c2=O)CCCCC3)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?