COc1ccc(CNC(=O)CN(C(=O)CCC(=O)Nc2ccccn2)c2ccc3c(c2)OCO3)cc1
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?