title: Ethyl 2-[1,3-dioxo-6-(piperidin-1-yl)-2,3-dihydro-1H-benz[de]isoquinolin-2-yl]acetate.
abstract: In the title compound, C(21)H(22)N(2)O(4), the naphthalimide unit is almost planar (r.m.s. deviation = 0.081Å). The carboximide N atom and the five C atoms of the eth-oxy-carbonyl-methyl substituent also lie close to a common plane (r.m.s. deviation = 0.119Å), which subtends an angle of 71.06 (8)° to the naphthalamide plane. The piperidine ring adopts a chair conformation. In the crystal, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into zigzag chains along the a axis.
authors.forename: Song
authors.initials: S
authors.lastname: Xia
authors.forename: Chun-Ling
authors.initials: CL
authors.lastname: Zheng
authors.forename: Fei-Fei
authors.initials: FF
authors.lastname: He
authors.forename: Ya-Bin
authors.initials: YB
authors.lastname: Shi
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Wang