Cl.O.O=C(CCN1CCOCC1)Nc1ccc2c(c1)N(C(=O)CN1CCOCC1)c1ccccc1CC2
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?