where n is an integer having a value of five； Het is a six-membered saturated heterocycle containing five carbon atoms and one nitrogen atom, wherein Het is attached to the —(CH2)n— moiety at the carbon 4 position of the heterocycle； and R3 is hydrogen； or pharmaceutically acceptable salts thereof； and their use as vaccine adjuvants and in the treatment of various disorders.La présente invention concerne le composé 6-amino-9-[5-(4- pipéridinyl)pentyl]-2-[(lS)-l-méthylbutyl]oxy]-7,9-dihydro-8H-purin-8-one ou un sel pharmacetiquement acceptable de celui-ci.
