C#C[C@@]1(O)CC[C@@H]2[C@@H]3CCC4=C(CCC(=O)C4)[C@H]3CC[C@]21C
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?