For example, fumarase catalyzes the interconversion of malic acid and fumaric acid. 如延胡羧酸酶能催化蘋(píng)果酸和反丁烯二酸的可逆反應。
A new solid acid based on heteropolyacid has been proved to be a useful catalyst for the synthesis of dibutyl maleate. 新催化劑在順丁烯二酸二丁酯的合成反應中顯示很好的活性和溫和的反應條件。