The antioxidant properties of the most active compounds were tested through the evaluation of ROS scavenging effects against human glioma T67 cells exposed to high level of tert-butyl hydroperoxide (TBH, 100 μM) in the presence or absence of pre-treatment with sulforaphane, used as a potent inducer of NAD(P)H quinone oxidoreductase 1 (NQO1), which is an inducible enzyme involved in the conversion of quinones into the more antioxidant hydroquinone forms [132]. Here, NQO1 is linked to central nervous system cancer.