minimum toxic dose ( concentration required to produce definite evidence of microscopic cytotoxicity in rapidly growing rk-13 cells ) was determined for each compound and was found to be 512 , 172 , 64 , 8 , and less than 0.5 microgram/ml for mmudr , paa , ara-a , etudr , and iudr , respectively .
C0011535
etudr
C0020811
iudr