title: n-Butyl 2-(3-chloro-1,2-dihydro-pyrazin-2-yl-idene)-2-cyano-acetate.
abstract: The title compound, C(11)H(12)ClN(3)O(2), is essentially planar except for the n-but-oxy group [r.m.s. deviation from the least-squares plane = 0.0131 (1) Å for 11 non-H atoms]. An intra-molecular N-H⋯O inter-action results in the formation of an S(6) ring. The n-butoxy chain in the molecule is disordered over two sets of sites of equal occupancy.
authors.forename: Anita
authors.initials: A
authors.lastname: Stefańska
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Ossowski
authors.forename: Lukasz
authors.initials: L
authors.lastname: Ponikiewski