1,4,7,10,13-pentaoxacyclopentadecane-2,3-dione

2,3,17,18-tetraoxo-1,4,7,10,13,16,19,22,25,28-decaoxacyclotricontane

1,4,7,10,13,16,19,22,25,28,31,34,37,40,43-pentadecaoxacyclopentatetracontane-2,3,17,18,32,33-hexaone

1,4,7,10,13,16-hexaoxacyclooctadecane-2,3,11,12-tetrone

3-trityloxypropanal