CCOC(=O)CCC(C(=O)OCC)n1nnc2cc(Nc3c(C)[n+]([O-])c4ccc(Cl)cc4[n+]3[O-])ccc21
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?