COc1ccc(C2C3=C(O)CC(C)(C)CC3=NC(C)=C2C(=O)N2CCOCC2)cc1O
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?