CC(=O)O[C@H]1CC[C@@]2(C)C(=CC[C@H]3[C@@H]4Cc5c(c(C)nn5-c5ccccc5)[C@@]4(C)CC[C@@H]32)C1
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?