Cc1ccc2c(c1Cl)NC(C(=O)O)C1CC(Sc3ccccc3[N+](=O)[O-])C(Cl)C21
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?