PhEthOH adds a small amount of complexity relative to AlkEthOH, including aromatic rings in addition to alkanes, ethers, and alcohols. It requires a total of 10 bond, six angle, 16 torsion, and nine nonbonded smirnoff99Frosst parameters. As with AlkEthOH, we performed 10 SMIRKY simulations at each temperature for each fragment type. This small increase in complexity also increased the difficulty of matching all reference types simultaneously, as shown by the drop in average total score for all fragment types (Table ). For bonds, angles, and nonbonded fragment types, SMIRKY is able to achieve a 100% total score; however, the same could not be said for torsions (Table ). However, SMIRKY is able to find a 100% partial score for all torsions at most temperatures (Table ).