On the left side, the six molecules of BUT, PET, HEX, OCT, CHP, and COC are dissolved in the CHE solvent. The calculated MAD of the solvation free energies for these systems is 1.7 kJ/mol, indicating that their CG models could accurately reproduce the solvation free energies of corresponding AA models. Moreover, the errors in solvation free energy calculated from the CG models haven't significantly increased with the size of the solutes, suggesting that the AEX method maintained high accuracy even for larger molecules. Coupled with the density data calculated in Figure , it becomes clear that the AEX method not only adequately reproduces the densities of pure alkane solutions but also accurately does the solvation free energies of small alkane molecules in the CHE solvent.