CC(=O)N1CC[N+](C)(CCCCN2c3ccccc3Sc3cc(N=[N+]=[N-])ccc32)CC1.[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?