645-15-8 BNPP Bis(4-nitrophenyl) phosphate Bis(p-nitrophenyl) phosphate Di-p-nitrophenyl phosphate NSC59824 Phosphoric acid bis(p-nitrophenyl ester) Phosphoric acid bis(p-nitrophenyl) ester Phosphoric acid, bis(4-nitrophenyl) ester Phosphoric acid, bis(p-nitrophenyl) ester p-Nitrophenyl monohydrogen phosphate