7-Bromo-1,5-dihydro-3,6-dimethylimidazo[2,1-b]quinazolin-2(3H)-one (Ro 15-2041), a potent antithrombotic agent that selectively inhibits platelet cyclic AMP-phosphodiesterase - Muggli,R.; Tschopp,T.B.; Mittelholzer,E.; Baumgartner,H.R. (J Pharmacol Exp Ther, 1985)