5-Decyl-2-(1,4,7,10,13,16,19-heptaoxa-cyclohenicos-2-ylmethoxy)-benzoic acid methyl ester

3-<2-(21-crown-7-methoxy)phenyl>-4'-N,N-dimethylaminobenzene

2-(2-aminophenoxy)methyl-21-crown-7

2-<2-(3-aminophenyl)phenoxymethyl>-21-crown-7

2-<2-(3-nitrophenyl)phenoxymethyl>-21-crown-7