CC1(C)O[C@@H]2[C@@H](COS(=O)(=O)[O-])O[C@@H](n3c(S)nc4c(O)nc(N)nc43)[C@@H]2O1.[K+]
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?