O=C(c1cccs1)N1CCC(c2nc(O)c3nnn(Cc4cccc(Cl)c4)c3n2)CC1
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?