The compound 2-[1-(6-aminopurin-9-yl)-2-oxoethoxy]prop-2-enal of formula (I), its monohydrate of formula (II), or its corresponding cyclic monohydrate of formula (III), in which the stereochemical chiral center indicated with an asterisk can be R (Rectus), S (Sinister) or racemic, including the tautomers of the adenine ring and the pharmaceutically acceptable salts, are used in the treatment of inflammatory disorders or of pain disorders.