O=C(NCCCN1CCCC1)c1ccc2c(c1)N(Cc1ccccc1F)C(=O)c1ccccc1[S+]2[O-]
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?