Figure 6 ESPs derived by XDPROP (Volkov et al., 2016) for (a) A and the asymmetric part for (b) B. 3D plot made using MoleCoolQt (Hübschle & Dittrich, 2011). The isodensity surface is drawn at 0.2 e Å−3. The ESP values are given in the interval −0.916 to 2.386 e Å−1 for A and in the interval −0.543 to 0.911 e Å−1 for B.