O=C1c2[nH]nc(-c3ccccc3O)c2C(c2cccc(OCc3ccccc3)c2)N1CCO
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?