four types of 1-beta-d-arabinofuranosylcytosine ( ara-c ) conjugates with poly-l-glutamic acid ( plga ) or poly-n5- ( 2-hydroxyethyl ) -l-glutamine ( pheg ) were prepared in an attempt to enhance the efficacy of the drug in simple dosage schedules .
C0061472
l-glutamic acid
C0017797
l-glutamine