Cl.Nc1cc2c3c(cccc3c1)C(=O)N(CCN1CCN(CCN3C(=O)c4cccc5cc(N)cc(c45)C3=O)CC1)C2=O
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?