A quantitative structure-activity relationship (QSAR) for 90 nitrosoureas acting against L-1210 leukemia in mice has been formulated. This QSAR is compared with one correlating the LD10 of 96 nitrosoureas. The results indicate that neutral nitrosoureas with octanol/water partition coefficients in the range of -1.5 to -2.5 might have better therapeutic indices than those currently in use.
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