1 XPR (2s,3as,6r,7as)-6-(sulfooxy)octahydro-1h-indole-2-carboxylic acid 1.000 2 A1AT6 (2s)-2,3-dihydro-1h-indole-2-carboxylic acid 0.706 3 ICB 1h-indole-2-carboxylic acid 0.706 4 OIC Octahydroindole-2-carboxylic acid 0.706