COc1ccc2c(c1)[C@@H]1[C@H](CO2)[C@H](c2ccccc2)[C@]2(C)C(=O)NCC(=O)N12
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?