C=C1[C@@H]2C[C@]3(C(CC2=O)[C@]24C5C[C@H]3[C@H]2N(CC)C[C@]5(C)CC[C@@H]4O)[C@@H]1O
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?