title: Ethyl {6-[6-(ethoxy-carbon-yl)picolin-amido-carbon-yl]picolinamido-carbon-yl}picolinate.
abstract: The title mol-ecule, C(25)H(21)N(5)O(8), adopts a helical conformation, which is stabilized by two intra-molecular bifurcated N-H⋯(N,N) hydrogen bonds.
authors.affiliation: Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China, and Graduate University of the Chinese Academy of Sciences (GUCAS), Beijing 100049, People's Republic of China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Li
authors.forename: Yaobing
authors.initials: Y
authors.lastname: Wang
authors.forename: Chuanlang
authors.initials: C
authors.lastname: Zhan
authors.forename: Jiannian
authors.initials: J
authors.lastname: Yao