CC(=O)C1[C@H](N(C)C)CC2C3CC=C4CC(O)CC[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?