Figure 3
Molecular profiles of selected tetramethylxanthenediones: (a) (I), (b) (II), (c) (V) and (d) (IV). For (II), (IV) and (V), the original atom coordinates (Jeyakanthan et al., 1999; Bigdeli et al., 2007) were used. In all cases, H atoms have been omitted for the sake of clarity. |