el-Masdouri L, Aubry A, Gomez E, Vitoux B, Marraud M
Laboratoire de minéralogie et cristallographie, UA CNRS 809, Université de Nancy I, France.
Acta Crystallogr C. 1992 Jan 15;48 ( Pt 1):178-9. doi: 10.1107/s0108270191008132.
N,N'-Dimethylisopropylmalonamide, C8H16N2O2, Mr = 172.23, orthorhombic, Pbcm, a = 4.859 (1), b = 13.523 (2), c = 15,469 (2) A, V = 1016.4 A3, Z = 4, Dx = 1.12 g cm-3, lambda(Cu K alpha) = 1.5418 A, microRmax much less than 1, mu = 5.88 cm-1, F(000) = 376, T = 293 K, R = 0.060 for 665 observed reflections. Dimensions of this retropeptide molecule are quite similar to the standard values for peptides. The C alpha and C beta atoms are in a mirror (z = 1/4), so conformational angles are psi' = -psi = -110.4 degrees (2).
N,N'-二甲基异丙基丙二酰胺，C8H16N2O2，Mr = 172.23，正交晶系，Pbcm空间群，a = 4.859 (1) Å，b = 13.523 (2) Å，c = 15.469 (2) Å，V = 1016.4 ų，Z = 4，Dx = 1.12 g cm⁻³，λ(Cu Kα) = 1.5418 Å，微观Rmax远小于1，μ = 5.88 cm⁻¹，F(000) = 376，T = 293 K，对于665个观测反射，R = 0.060。这个逆肽分子的尺寸与肽的标准值非常相似。Cα和Cβ原子处于镜像关系（z = 1/4），因此构象角为ψ' = -ψ = -110.4° (2)。
