763-51-9
diethyl 2-bromobutanedioate
→
1703-58-8
丁烷四羧
108479-89-6
racem.-butane-1,2,3,4-tetracarboxylic acid-1,4-diethyl ester-2,3-anhydride
88-98-2
4-环己烯-1,2-二羧酸
996-82-7
sodium 1,3-diethoxy-1,3-dioxopropan-2-ide
85-43-8
四氢化邻苯二甲酸酐