Photochemistry of an anticancer drug flutamide, 2-methyl-N-[4-nitro-3-(trifluoromethyl) phenyl] propanamide has been investigated in various media in the absence and presence of 0.1 T magnetic field. On photoexcitation flutamide gives rise to a phenol derivative through nitro-to-nitrite rearrangement in homogeneous as well as in inhomogeneous solutions. Magnetic field effects on the product yields revealed that a radical pair is involved in the ...