C[C@H](O)[C@@H](C(=O)N1CCN(C(=O)OC(C)(C)C)CC1)n1cc(CCCCNC(=O)OC(C)(C)C)nn1
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?