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?? ???? >4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid
4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid
4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid ??
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4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid C??? ??, ??, ??
4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid ?? ?? ? ???
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4-({4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}amino)-4-oxo-2-butenoic acid ?? ??
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