Patent ID: 6872804

Claim:
A glycopeptide of formula II: wherein: R 3 is —OH; R 5 is hydrogen; R 19 is hydrogen; R 20 is —R a —S—(CO)—R h ; R a is alkylene, alkenylene, alkynylene, cycloalkylene, cycloalkenylene arylene, heteroarylene, heterocyclene, —C(O)-alkylene, —C(O)-alkenylene —C(O)-alkynylene, —C(O)-cycloalkylene, —C(O)-cycloallcenylene —C(O)-arylene, —C(O)-heteroarylene or heterocyclene; and R h is alkyl, alkenyl, alkynyl, cycloalkyl, cydoalkenyl, aryl, heteroaryl, or heterocyclic; or a pharmaceutically acceptable salt, stereoisonier, or prodrug thereof.