1293537 MUG 4-methylumbelliferyl-beta-D-glucuronide 78 3739162 4-MUG 4-methylumbelliferyl glucuronide 19 2715184 4MUGL 4-methylumbelliferyl-beta-D-glucuronide 1 1996600 BRI-LA-MUG 4-methylumbelliferyl-beta-D-glucuronide 1 3714098 MUF-beta-glucuronide 4-methylumbelliferyl-beta-D-glucuronide 1 3593029 MUG-HR 4-methylumbelliferyl-beta-D-glucuronide 1