CC(C)(C)OC(=O)N1CCC[C@H]1C(=O)NC[C@H]1CC[C@H](C(=O)O)CC1
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?