however , when the criteria for positive drug activity consisted of the attainment of tumor regressions of greater than or equal to 50 % in greater than or equal to 20 % of the treated individuals ( i.e. , analogous to clinical criteria ) , only the three drugs that are known to be active against human breast cancer ( pam , ctx , and fura ) were judged active against the spontaneous murine breast tumors .
C0016360
fura
C1458155
breast tumors