1 GS9 Naphthalen-2-yl 1-thio-beta-D-galactopyranoside 1.000 2 FYJ Phenyl 1-thio-beta-D-glucopyranosiduronic acid 0.783 3 OTN 2-nitrophenyl 1-thio-beta-D-galactopyranoside 0.720 4 PSG 4-nitrophenyl 1-thio-beta-D-glucopyranoside 0.720