COc1ccc(Nc2c3c(nc4ccc(NC(=O)c5cc(Cl)ccc5OC)cc24)CCCC3)cc1OC
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?