COc1ccccc1C1C(C(=O)c2ccc(OC(C)C)cc2)=C(O)C(=O)N1c1cc(C)on1
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?