O=C1C2C3C=CC(c4ccccc4)(C2C(=O)N1c1cccc(Cl)c1)C1C(=O)N(c2cccc(Cl)c2)C(=O)C31
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?