A metabolite of sulindac that inhibits both COX-1 and COX-2 (IC50s = 1.9 and 1.21 µM, respectively); also inhibits aldose reductase (IC50 = 279 nM), blocking NADPH-dependent reduction of glucose to sorbitol, and reducing type 2 diabetic complications; inhibits colorectal cancer growth both in vitro and in vivo.