O[C@@H](c1cc([C@@]23C[C@H]4CC[C@@H]2C[C@H](C4)C3)nc2c(Cl)cc(Cl)cc12)[C@@H]1CCCCN1
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?