COc1ccc2nc(O)c(CN(Cc3cccs3)S(=O)(=O)c3c(C)ccc4nsnc34)cc2c1
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?