O=C(O)CC12CC3CC(C1)CC(n1ncc(N4CCC5(CC4)OCCO5)c(Cl)c1=O)(C3)C2
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?