5,6-Dihydropyrrolo[1,2-c]pyrimidine-1,3(2H,5H)-diones as Annulated Analogues of the Anti-HIV Compound MKC-442 (6-Benzyl-1-(ethoxymethyl)-5-isopropyluracil) - Danel, Krzysztof; Pedersen, Erik B; Nielsen, Claus (Synthesis, 1997)