CC(C)OCC(O)CN1CCN(CCN2C(=O)c3cccc4cccc(c34)C2=O)CC1.Cl
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?