(E)-4-[(2-Ethylhexyl)amino]-4-oxo-2-butenoic acid
(E)-4-[(2-Ethylhexyl)amino]-4-oxo-2-butenoic acid ??
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(E)-4-[(2-Ethylhexyl)amino]-4-oxo-2-butenoic acid C??? ??, ??, ??
(E)-4-[(2-Ethylhexyl)amino]-4-oxo-2-butenoic acid ?? ?? ? ???
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(E)-4-[(2-Ethylhexyl)amino]-4-oxo-2-butenoic acid ?? ??
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