COc1ccc(C[C@@H]2OC3(C=CC(=O)C=C3)O[C@H]2Cc2ccc(OC)cc2)cc1
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?