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