Synthesis of condensed tetrahydroimidazo[1,2-a]quinazoline-1,5-dione derivatives - Iminov, Rustam T.; Tverdokhlebov, Anton V.; Tolmachev, Andrey A.; Volovenko, Yulian M.; Shishkina, Svetlana V.; Shishkin, Oleg. V. (Tetrahedron, 2012)