CCc1ccc(Nc2n[n+](-c3ccccc3)c(-c3ccc(OC)c(Br)c3)s2)cc1.[Cl-]
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?