COc1cc(/C=N\c2nc(-c3ccc(NS(=O)(=O)c4ccc(Cl)c(OC)c4)cc3)cs2)ccc1O
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?