Cc1[nH]c(=O)[nH]c(=O)c1C1N2CC3(C(C)C)CN1CC(C(C)C)(C2)C3=O
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?