CC(C)(C)c1ccc2c(c1)CNCCNCc1cc(C(C)(C)C)ccc1OCC1(CO2)COc2ccc(C(C)(C)C)cc2CNCCNCc2cc(C(C)(C)C)ccc2OC1
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?