CCOC(=O)c1cc2c(=O)n3cccc(C)c3nc2n(Cc2ccco2)/c1=N/C(=O)c1cccnc1
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?