CCN(CC)CCN1C(=O)C2C(C(=O)Nc3cccc(C)c3)C3C=CC2(O3)C1C(=O)NC1CCCC(C)C1C
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?