abstract |
Compound with the following formula: in which at least two of R1, R2, R4 and R5 are H, and the rest are each R6, OR6, Cl, Br, I, F or NO2; R3 is -CH = CHNO2, R6 is H, C (CH3) 3, CH (CH3) 2, CH2CH (CH3) 2, CH (CH3) (CH2) 0-3CH3 or (CH2) 0-3CH3; or a salt thereof. |