O=C(CCN1C(=O)c2ccccc2C1=O)C1=NN[C@@H]2C(=O)N(c3ccc4c(c3)OCCO4)C(=O)[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?