LRP lrp 2-amino-9-[(2R,3R,4S,5R)-5-({[(R)-{[(S)-{[(R)-({(2R,3R,4R,5R)-5-[6-(dimethylamino)-9H-purin-9-yl]-3-hydroxy-4-methoxytetrahydrofuran-2-yl}methoxy)(hydroxy)phosphoryl]oxy}(hydroxy)phosphoryl]oxy}(hydroxy)phosphoryl]oxy}methyl)-3,4-dihydroxytetrahydrofuran-2-yl]-7-methyl-6-oxo-6,9-dihydro-1H-purin-7-ium LRP