1 SS8 3-phenethyl-4h-furo[3,2-B]pyrrole-5-carboxylic acid 1.000 2 XOS 3-[(E)-2-(4-hydroxyphenyl)ethenyl]benzoic acid 0.762 3 XLO 3-[(E)-2-(2-chloro-4-hydroxyphenyl)ethenyl]benzoic acid 0.727 4 SE5 4-(4-chlorophenethyl)-1h-pyrrole-2-carboxylic acid 0.714