C[N+]12C=CC=C1C(N1CCCC1)c1scc(-c3ccc(Br)cc3)c12.[I-]
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?