1-(5-Bromo-pyridin-2-yl)-3-[2-(4-{4-[3-(5-hydroxymethyl-2,5-dihydro-furan-2-yl)-5-methyl-2,6-dioxo-3,6-dihydro-2H-pyrimidin-1-yl]-butyl}-piperazin-1-yl)-ethyl]-thiourea AIDS-163197 AIDS163197 Heterodimer [d4T]N^3-(CH2)4-N-piperazinly[trovirdine analogue]