potentials of 2,3 dimercapto succinic acid ( dms ) and d-penicillamine , the currently acclaimed heavy metal chelating drugs , to enhance urinary excretion of lead and restore altered levels of urinary delta-amino-levulinic acid ( delta-ala ) and blood lead , -zinc-protoporphyrin ( zpp ) -delta-aminolevulinic acid dehydratase ( delta-ala-d ) in lead poisoned rabbits , were compared .
C0347988
heavy metal
C0023175
lead