| 摘要 |
Compounds and methods of preparing compounds represented by structural formu la (I) wherein X represents any suitable counter-anion; R1 and R2 independently represent hydrogen, C1-6 alkoxy or nitro; R3, R4, R5 and R6 each independent ly represents hydrogen, hydroxy, halo, C1-6 alkyl, C2-6 alkenyl or C1-6 alkoxy; and R7, R8, R9 and R10 each independently represents hydrogen, hydroxy, halo , C1-6 alkyl, C2-6 alkenyl or C1-6 alkoxy. Compounds represented by structural formula (I) are useful in treating or preventing free radical-associated diseases or conditions in mammals.
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