title: Diethyl 3,3'-(phenyl-methyl-ene)bis-(1H-indole-2-carboxyl-ate).
abstract: In the title compound, C(29)H(26)N(2)O(4), the benzene ring is twisted by 73.5 (5) and 84.9 (3)° with respect to the mean planes of the two indole ring systems; the mean planes of the indole ring systems are oriented at a dihedral angle of 82.0 (5)°. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds into chains.
authors.affiliation: Chemical Engineering Department, Nanjing College of Chemical Technology, Nanjing 210048,  People's Republic of China.
authors.forename: Hong-Shun
authors.initials: HS
authors.lastname: Sun
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Li
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Zhang