NC(=O)c1ncn([C@@H]2O[C@H](CNS(=O)(=O)c3cc4ccccc4s3)[C@@H](O)[C@H]2O)n1
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?