1-(9H-Fluoren-9-yl)-3-oxo-2,7,10,13-tetraoxa-4-azapentadecan-15-oic acid
tert-Butyl 1-bromo-2-oxo-6,9,12-trioxa-3-azapentadecan-15-oate
3-Oxo-1-phenyl-2,7,10,13-tetraoxa-4-azapentadecan-15-oic acid
