O=C1C2C3C4C1C1C2[C@H](OCc2ccccc2)C3C1[C@H]4OCc1ccccc1
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?