58446-29-0 Diflunisal glucuronide ether Diflunisal phenolic glucuronide beta-D-Glucopyranosiduronic acid, 3-carboxy-2',4'-difluoro(1,1'-biphenyl)-4-yl beta-D-Glucopyranosiduronic acid, 3-carboxy-2',4'-difluoro(1,1'-biphenyl)-4-yl, stereoisomer