COc1cc(C(=O)C/C(CCCC(=O)Nc2ccccc2[N+](=O)[O-])=N/NC(=O)c2cc3ccccc3cc2O)ccc1O
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?