N#Cc1cc([N+](=O)[O-])ccc1NC(=O)C(=O)C(C(=O)c1ccc2ccccc2c1)C1OCc2ccccc21
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?