2-`3-AMINO-4-(N-HYDROXYAMINO)-SUCCINYLAMINO-ACETAMIDES FOR USE AS CD23 FORMATION INHIBITORS

摘要

Compounds of formula (I): wherein X1 is alkyl, sulphonyl or carboxy; X2 is hydrogen or alkyl; R1 is arylmethyl or heterocyclylmethyl; R2 is alkyl, alkenyl, aryl, cycloalkyl or cycloalkenyl; and R3 is hydrogen, alkyl, alkenyl, alkynyl or aryl; are useful in the treatment of disorders mediated by s-CD23.