BIS(4-METHYLUMBELLIFERYL)PYROPHOSPHATE, DISODIUM SALT 4-METHYLUMBELLIFERYL PYROPHOSPHATE DIESTER DISODIUM SALT disodium P,P'-bis(4-methyl-2-oxo-2H-1-benzopyran-7-yl) diphosphate Diphosphoric acid α,β-bis(4-methyl-2-oxo-2H-1-benzopyran-7-yl)=α,β-disodium salt Einecs 282-657-5 Bis(4-methylumbelliferyl)pyrophosphoric acid, disodium salt