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2,4-Difluorocinnamic acid94977-52-341 % similar trans-2,6-Difluorocinnamic acid102082-89-340 % similar 3-(2-Thienyl)-2-propenoic acid1124-65-840 % similar 3-(2-Thienyl)acrylic acid15690-25-240 % similar 2,4,5-Trifluorocinnamic acid247170-17-840 % similar Furylacrylic acid539-47-940 % similar 3-Acetylindole703-80-040 % similar 2',3'-Dimethoxycinnamic acid7345-82-640 % similar 3-(2,3-Dimethoxyphenyl)-2-propenoic acid7461-60-140 % similar 3-(2,4-Dichlorophenyl)-2-propenoic acid1201-99-640 % similar trans-2,4-Dichlorocinnamic acid20595-45-340 % similar (2E)-3-(2,5-Dichlorophenyl)prop-2-enoic acid20595-47-540 % similar Indole-3-lactic acid1821-52-940 % similar Urocanic acid104-98-340 % similar (2E)-3-(3-Fluorophenyl)-2-propenoic acid20595-30-640 % similar 3-(3-Fluorophenyl)-2-propenoic acid458-46-840 % similar Indoxyl480-93-339 % similar 2-Chloro-4-fluorocinnamic acid133220-86-739 % similar 3-(2-Bromo-5-fluorophenyl)-2-propenoic acid202865-70-139 % similar 2-Bromo-4-fluorocinnamic acid289038-17-139 % similar