CCOC(=O)c1c(C)oc2c1c(CN1CCN(C(=O)OCC)CC1)c(O)c1ccccc12
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?