CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)N1CCC(C(=O)N[C@@H](Cc2c[nH]c3ccccc23)C(=O)O)CC1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?