2-Propenoicacid, 3-(2,4-difluorophenyl)-, (E)-;(2E)-3-(2,4-Difluorophenyl)-2-propenoicacid;(E)-2,4-Difluorocinnamic acid;trans-2,4-Difluorocinnamic acid;trans-3-(2,4-Difluorophenyl)-2-propenoic acid;
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