"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"
"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"
"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"
"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"
"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"
"(2S,5S)-3,6-Dioxo-2,5-piperazinediacetamide"