Cc1cnc2c(c1)C(=O)C1=C(C2=O)C2OC(=O)CC2OC1(C)C
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?