COc1ccccc1CNC(=O)CCC1N=C2c3ccccc3N=C(SCC(=O)NCCc3ccc(OC)c(OC)c3)N2C1=O
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?