COc1cc(C2Nc3ccccc3N=C3CC(c4ccc(OC)c(OC)c4)CC(O)=C32)ccc1O
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?