2-[(3Z)-6-fluoro-2-methyl-3-[(4-methylsulfanylphenyl)methylidene]inden-1-yl]acetic acid; Sulindac Sulfide; (Z)-5-Fluoro-2-methyl-1-[p-(methylthio)benzylidene]indene-3-acetic Acid; (Z)-2-{5-Fluoro-2-methyl-1-[4-(methylthio)benzylidene]-1H-inden-3-yl}acetic Acid; Sulindac Related Compound C (USP)