COC(=O)c1nc2n(n1)C(c1ccc(OC)c(OC)c1OC)C1=C(O)CCCC1=N2
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?