2-(2,4-Dinitro-phenylamino)-3-hydroxy-propionic acid 2-(2,4-Dinitroanilino)-3-hydroxypropanoic acid 2-[(2,4-Dinitrophenyl)amino]-3-hydroxypropanoic acid 2,4-Dinitrophenyl-DL-Serine DL-DNP-Serine DL-Serine, N-(2,4-dinitrophenyl)- N-(2,4-Dinitrophenyl)-DL-serine N-(2,4-Dinitrophenyl)serine Serine, N-(2,4-dinitrophenyl)- Serine, N-(2,4-dinitrophenyl)-, DL-