COC(=O)c1ccc2c(c1)C(C)(C)C(/C=C/c1ccccc1O)=[N+]2C.[I-]
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?