6-mercaptopurine-9-beta-d-ribofuranoside 5'-monophosphate [ mprp ] , bis ( 6-mercaptopurine-9-beta-d-ribofuranoside ) -5 ' , 5 '' '' '-monophosphate [ bis ( mpr ) p ] , bis ( o2 ' , o3'-dibutyryl-6-mercaptopurine-9-beta-d-ribofuranoside ) -5 ' , 5 '' '' '-monophosphate [ bis ( dibut.mpr ) p ] , and o2 ' , o3'-dibutyryl-6-mercaptopurine-9-beta-d-ribofuranoside 5'-monophosphate [ dibut.mprp ] were tested for cytotoxic and/or growth inhibitory effects against mp-resistant sublines of v79 chinese hamster lung fibroblasts ( ch/tg ) and l1210 mouse leukaemia cells ( l1210/mpr ) in which deficiencies of hypoxanthine-guanine phosphoribosyltransferase , and hence drug nucleotide forming capacity were the basis of resistance .
C0030054
C0030106
' ,