title: Dimethyl 3-(cyclo-propyl-carbon-yl)pyrrolo-[2,1-a]isoquinoline-1,2-dicarboxyl-ate.
abstract: In the mol-ecular structure of the title compound, C(20)H(17)NO(5), two intra-molecular C-H⋯O hydrogen bond generate six- and seven-membered ring motifs. The dihedral angles between the almost planar 13-atom triple-fused-ring system (r.m.s. deviation = 0.003 Å) and the planes of the two meth-oxy-carbonyl substituents are 61.7 (2) and 33.01 (10)°.
authors.forename: Honglong
authors.initials: H
authors.lastname: Xing
authors.forename: Fan
authors.initials: F
authors.lastname: Tang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang