CCOC(=O)c1c(C)[nH]c(C(=O)COC(=O)c2cn(CC)c3nc(C)ccc3c2=O)c1C
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?