In the second part, a coarse-grained SOM model is created, based on an atomistic reference from the VSOMM2. Thereby, the aforementioned coarse-grained fragments are used for the model construction. More specifically, coarse-grained models of LHA are investigated and compared to atomistic models. Bonded interactions between coarse-grained fragments are automatically determined via Direct Boltzmann Inversion (DBI), which is further explained below (see section 2.2.4). The modeling approach was based on previous works that examined LHA at the atomistic level .