O=c1ccn([C@@H]2O[C@@H](COP(=O)([O-])OP(=O)([O-])O)[C@H](O)[C@@H]2O)c(=O)[nH]1.[Na+].[Na+]
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?