2-chloroadenine
ethyl 2-[6-amino-2-{3-(t-butoxycarbonylamino)-propyl}amino-9H-purin-9-yl]acetate
ethyl N-[2-{2-(benzo[d]thiazole)sulfonyl}amino-ethyl]-N-[2-[6-(benzyloxycarbonyl)amino-2-{3-(t-butoxycarbonylamino)-propyl}amino-9H-purin-9-yl]acetyl]glycinate
1-(benzo[d]thiazole-2-sulfonyl)-2-oxo-4-[[6-(benzyl-oxycarbonyl)amino-2-{3-(t-butoxycarbonylamino)propylamino}-9H-purin-9-yl]-acetyl]piperazine