6-[3-(4-acetyl-2-ethyl-5-hydroxyphenoxy)propoxy]-5-(2-carboxyethyl)-9-oxoxanthene-2-carboxylic acid
6-[3-(4-acetyl-2-ethyl-5-hydroxy-phenoxy)propoxy]-5-(2-carboxyethyl)-9-oxo-xanthene-2-carboxylic acid
6-[3-(4-acetyl-2-ethyl-5-hydroxyphenoxy)propoxy]-5-(2-carboxyethyl)-9-oxo-2-xanthenecarboxylic acid
6-[3-(4-acetyl-2-ethyl-5-hydroxy-phenoxy)propoxy]-5-(2-carboxyethyl)-9-keto-xanthene-2-carboxylic acid
5-(2-carboxyethyl)-6-[3-(4-ethanoyl-2-ethyl-5-hydroxy-phenoxy)propoxy]-9-oxo-xanthene-2-carboxylic acid