1H-purine-2,6-dione, 3,7-dihydro-8-phenyl-1-(2-propynyl)- 8-phenyl-1-prop-2-yn-1-yl-3,7-dihydro-1H-purine-2,6-dione InChI=1/C14H10N4O2/c1-2-8-18-13(19)10-12(17-14(18)20)16-11(15-10)9-6-4-3-5-7-9/h1,3-7H,8H2,(H,15,16)(H,17,20