SMILES: C1=CC=C(C=C1)O[P+](=O)OC2=CC=C(C=C2)[N+](=O)[O-]
Description: The molecule is an aryl phosphate resulting from the formal condensation of phosphonic acid with 1 mol eq. each of phenol and 4-nitrophenol. It has a role as a chromogenic compound. It derives from a phenol and a 4-nitrophenol.