CC(=O)O[C@H]1[C@@H](N2CCN(C)CC2)C[C@H]2[C@@H]3CC=C4C[C@@H](N5CCCC5)CC[C@]4(C)[C@H]3CC[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?