COc1ccc(C2=NN(C(=O)CCC(=O)O)C(c3ccc([N+](=O)[O-])cc3)C2)cc1
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?