CCOc1ccc(OCC)c(-c2c(=O)n(OCc3ccc(Cl)cc3)c3ccccc3[n+]2[O-])c1
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?