CC(=O)O[C@H]1CCC2[C@@H]3CCC4c5nonc5CC[C@]4(C)C3CC[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?