116370-32-2 1H-Purine-2,6-dione, 3-(2-(4-amino-3-(iodo-125I)phenyl)ethyl)-8-cyclopentyl-3,7-dihydro-1-propyl- 3-(3-Iodo-4-amino)phenethyl-1-propyl-8-cyclopentylxanthine I BW A 844U I-BW-A844U I-Bwa844U