CC1Cc2cc(C(=O)C3=C(O)C(=O)N(CCN4CCOCC4)C3c3ccc(N(C)C)cc3)ccc2O1
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?