1 FDP 2,6-di-O-phosphono-beta-D-fructofuranose 1.000 2 RI2 1,5-di-O-phosphono-alpha-D-ribofuranose 0.900 3 F1X 1-O-phosphono-beta-D-fructofuranose 0.714 4 F6P 6-O-phosphono-beta-D-fructofuranose 0.714 5 P6P 6-O-phosphono-alpha-D-fructofuranose 0.714 6 TA6 6-O-phosphono-beta-D-tagatofuranose 0.714