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R-4(4)(30) rectangular rings in 2,5-dioxopiperazine-1,4-diacetic acid

Authors: Silva, MR; Beja, AMM; Paixao, JA; Sobral, AJFN; Cabral, LML; Gonsalves, AMDR

Ref.: Acta Crystallogr. Section C 59(10), o562 (2003)

DOI: 10.1107/S0108270103017803