COC(=O)C1CN(C(=O)C(C)Oc2ccc(C(C)C)cc2)c2ccccc2O1
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?