Recently, Woolley and Stewart have described the cure of some spontaneous mammary cancers of mice with certain analogs of 1, Zdimet hyl-4, 5-diaminobenzene (4, 5-dimethyl-o- phenylenediamine). l The theoretical basis for the use of such compounds has been explained in a series of papers during the past In the present paper the synthesis of these compounds and of some of their less potent relatives is described. The most active ...