2,3-DIMETHYL-1,2,3,4-TETRAHYDRO-QUINOXALINE-5-CARBOXYLIC ACID, 2,4,6-Trinitrobenzen esulfonic acid, 2,4,6-trinitro-benzenesulfonicaci, 2,4,6-Trinitro-Benzenesulfonic Acid, TNBSA, 2,4,6-trinitrobenzene-1-sulfonic acid, TNBS, trinitrobenzenesulfonicacid, Picrylsulfonic acid, 2,4,6-trinitrobenzensulfonate, Trinitrobenzene sulphonic acid, Picrylsulfonic acid solution, TrinitrobenzoylsulfonicAcid, 2,4,6-TRINITOBENZENESULFONIC ACID, PICRYLSULPHONICACID, 2,4,6-Trinitrobenzenesulfonic acid, 2,4,6-trinitrophenylsulfonic acid