O=C(c1ccc(-c2nnc(Nc3ccccc3)c3ccccc23)cc1)N1C[C@H]2C[C@H](C1)c1cccc(=O)n1C2
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?