CCC[n+]1cn(/C(C([S-])=Nc2cccc(Cl)c2C)=C(/O)c2ccc(OC)c(OC)c2)c2ccccc21
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?