COc1ccc2c(c1)OC[C@H]1[C@H]2N2C(=O)CN(Cc3ccccc3)C(=O)[C@@]2(C)[C@H]1c1ccccc1
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?