prov:value
| - Maleic anhydride and other acid anhydrides useful herein have the general structure wherein R and R??? are selected from the group consisting of hydrogen, halogen and cyanogen (???C???N) groups and alkyl, aryl, alkaryl, aralkyl, and cycloalkyl groups such as methyl, ethyl, propyl, octyl, decyl, phenyl, tolyl, xylyl, benzyl, cyclohexyl, and the like.
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