COC(=O)c1ccc2nc3c(cc2c1)[C@@H]1CCN2C(=O)CCC[C@H](C3)[C@H]12
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?