Помогоите с одной статьёй из Heterocycles:
A Convenient and Simplified Method for Synthesis of 1,4-Dioxo-1,2,4,5-tetrahydroimidazo[1,5-a]quinoxalines
Yoshihisa Kurasawa, Mitsugu Ichikawa, and Atsushi Takada
Heterocycles, Volume 20, Issue 2 ( February, 1, 1983 ), Pages 269-271
Код: Выделить всё
http://dx.doi.org/10.3987/R-1983-02-0269Organic