2-Benzyl-3-[1-oxo-2-(4-hydroxyphenyl)ethylamino]-8,10-dihydroxy-5,6-dihydrobenzo[f]quinoxaline C??? ??, ??, ??

2-Benzyl-3-[1-oxo-2-(4-hydroxyphenyl)ethylamino]-8,10-dihydroxy-5,6-dihydrobenzo[f]quinoxaline ?? ?? ? ???

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2-Benzyl-3-[1-oxo-2-(4-hydroxyphenyl)ethylamino]-8,10-dihydroxy-5,6-dihydrobenzo[f]quinoxaline ?? ??