COC(=O)c1c(O)ccc2c1c1c(n2Cc2ccccn2)C(=O)c2ccccc2C1=O
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?