prov:value
| - Olefinically-unsaturated acids of this broad class includes such widely divergent materials as the acrylic acids such as acrylic acid itself, methacrylic acid, ethacrylic acid, alpha-chloro acrylic acid, alpha-cyano acrylic acid and others, crotonic acid, sorbic acid, cinnamic acid, hydromuconic acid, itaconic acid, citraconic acid, mesaconic acid, muconic acid, glutaconic acid, aconitic acid, ??-
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