Nc1nc2c(nc(Br)n2[C@@H]2O[C@H]3COP(=O)([O-])O[C@@H]3[C@H]2O)c(=O)[nH]1.[Na+]
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?