O=C1N[C@@H](Cc2ccccc2)C(=O)N2[C@H]1CC1([C@]34C[C@H]5C(=O)N[C@@H](Cc6ccccc6)C(=O)N5[C@H]3Nc3ccccc34)c3ccccc3N[C@H]21
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?