(2R,3R)-2,3-Bis{[(2E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy}succinic acid and 4-amino-1-[(2R,5S)-5-(hydroxymethyl)tetrahydrofuran-2-yl]pyrimidin-2(1H)-one AIDS-195621 AIDS195621 DDC + L-CCA