C=CC1CN(C(=O)OCC(Cl)(Cl)Cl)C2CC3c4ccc(OC)cc4NC3C3CC1C2CO3
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?