CC(C)C[C@H](NP(=O)([O-])O[C@H]1O[C@H](C)[C@@H](O)[C@H](O)[C@@H]1O)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)[O-].[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?