100828-16-8 2-Piperazinecarboxylic acid, 4-(3-phosphonopropyl)- 2-Piperazinecarboxylic acid, 4-(3-phosphonopropyl)-, (+-)- 3-(2-Carboxypiperazin-4-yl)propyl-1-phosphonic acid 3-2-Cpp 4-(3-Phosphonopropyl)-2-piperazinecarboxylic acid DL-3-(2-Carboxypiperazin-4-yl)-propyl-1-phosphonic acid