| 摘要 |
<p>A liquid allergen composition of biological origin obtained by extraction at a pH value of between 5.5 and 6.5, which, as additive, comprises a compound of formula (I), in which X and Y are independently hydrogen or C1-C5 alkyl group, M is an alkylene or cycloalkylene group, A is a substituted or unsubstituted methylene group and n is equal to 0 or 1 or a pharmaceutically compatible salt of this compound. The allergenic compositions are storable at the extraction pH-values.</p> |
