CCOc1ccc(NC(=O)CSc2ncc3c(n2)-c2cc(Cl)ccc2N(C)S3(=O)=O)cc1
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?