4462-96-8
环丁烷-1,2-二甲酸酐
→
10359-27-0
cis-1,2-Dibrom-1,2-cyclobutandicarbonsaeure-dimethylester
+
3246-91-1
(+/-)-1,2-dibromo-cyclobutane-1r,2t-dicarboxylic acid dimethyl ester