Figure 1: Structure of SK-1.
From: Ultra-large supramolecular coordination cages composed of endohedral Archimedean and Platonic bodies

(a,b) Structures of the SK-1A and SK-1B. (c,d) Endohedral arrangement of Archimedean and Platonic bodies in SK-1A and SK-1B; inner octahedra are rotated in their basal planes by ca. 45° in SK-1A and SK-1B, respectively.