Synthesis and Physical Properties of Pyrido(1’,2’:1,2)imidazo(4,5-b)quinoxalines. Bull.Chem.Soc.Jpn. 1998. 71. 5. 1125-1135
TOMODA H, SAITO S, SHIRAISHI S. Synthesis or pyrido(1’,2’:1,2)imidazo(4,5-b)quinoxaline derivatives from 2-amino-3-chloroquinoxaline and pyridines. Chemistry Letters. 1990. 2. 267-268