CC(=O)O[C@H]1[C@@H](OC2CCCC2(c2ccccc2)c2ccccc2)O[N+]([O-])=C[C@@H]1c1ccccc1
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?