c1ccc2c(c1)[C@@H]1O[C@@H]1[C@@]13O[C@@]21[C@H]1O[C@H]1c1ccccc13
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?