COc1ccc(-c2ccoc2)cc1[C@H]1[C@H]2C=CC[C@@H](C)[C@@H]2C(=O)N1Cc1ccccc1
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?