6,9,12,15-tetrathia-1,3,5(2,6)-tripyridina-cyclopentadecaphane-2,4-dione

6,9-dithia-2,4(2,2)-bis-[1,3]dioxolana-1,3,5(2,6)-tripyridina-cyclononaphane

2,6-bis-[2-(6-ethoxy-pyridin-2-yl)-[1,3]dioxolan-2-yl]-pyridine