O=C1/C(=C/c2ccc3c(c2)OCO3)Sc2scc(-c3ccc(O)c(O)c3)[n+]21.[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?