CC1(C)C(OC(=O)CCC(=O)[O-])CC[C@]2(C)C1CC[C@@]1(C)C2C(=O)C=C2[C@@H]3C[C@@](C)(C(=O)[O-])CC[C@]3(C)CCC21C.[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?