CC(=O)O.CN1CCN(CN2C(=O)C3C4C=CC(C3C2=O)C2C3C(=O)N(CN5CCN(C)CC5)C(=O)C3C42)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?