COc1ccc(C)cc1Nc1n[n+](C)c(-c2c3ccccc3cc3ccccc23)s1.[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?