Cc1ccc2nc3c(cc(C(=O)NCCc4ccccc4)c(=N)n3CCN3CCOCC3)c(=O)n2c1
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?