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Urocanic acid104-98-3100 % similar 3-(4-Pyridinyl)-2-propenoic acid5337-79-147 % similar 3-(4-Pyridine)acrylic acid84228-93-347 % similar 3-(3-Pyridinyl)-2-propenoic acid1126-74-546 % similar trans-3-(3-Pyridyl)acrylic acid19337-97-446 % similar p-Phenylenediacrylic acid16323-43-645 % similar Imidazole-4-carboxaldehyde3034-50-245 % similar 1H-Imidazole-5-acetic acid645-65-842 % similar 1H-Imidazole-5-carboxylic acid1072-84-042 % similar Cinnamic acid140-10-342 % similar Cinnamic acid621-82-942 % similar 3-(2,3,4,5,6-Pentafluorophenyl)-2-propenoic acid719-60-842 % similar 2,4,5-Trifluorocinnamic acid247170-17-841 % similar 3-(2-Pyridinyl)-2-propenoic acid7340-22-940 % similar Indole-3-acrylic acid1204-06-440 % similar 3-Indoleacrylic acid29953-71-740 % similar 3-(4-Formylphenyl)-2-propenoic acid23359-08-239 % similar P-Coumaric acid501-98-439 % similar p-Coumaric acid7400-08-039 % similar Imidazoleacetic acid hydrochloride3251-69-239 % similar