title: 5-tert-Butyl 3-ethyl 1-isopropyl-4,5,6,7-tetra-hydro-1H-pyrazolo-[4,3-c]pyridine-3,5-dicarboxyl-ate.
abstract: In the title compound, C(17)H(27)N(3)O(4), the six-membered ring adopts a half-chair conformation with the N atom and the adjacent methyl-ene C atom displaced by -0.391 (2) and 0.358 (2) Å, respectively, from the plane of the other four atoms. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions.
authors.affiliation: Microscale Science Institute, Weifang University, Weifang 261061,  People's Republic of China.
authors.forename: Huan-Mei
authors.initials: HM
authors.lastname: Guo