CC1(C)CC(=O)C(=CNc2cc(C(=O)c3ccccc3)ccc2/N=C/C2=C(O)CC(C)(C)CC2=O)C(=O)C1
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?