C[C@H]1[C@H](C)CC[C@@]2(C(=O)O)CC[C@]3(C)C(=CC[C@H]4[C@]3(C)CC[C@H]3C(C)(C)[C@@H](O)CC[C@@]34C)[C@@H]12
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?