(2017/08/25)
p. 927 - 930
(2007/10/03)p. 685 - 690
(2007/10/03)but-2-enedioic acid diethyl ester
diethyl 2-acetylmethyl-1,4-butanedioate
cyclopropanecarboxylic acid chloride
3-hydroxy-5-ethoxycarbonylcyclohex-2-en-1-one
5-ethoxycarbonyl-cyclohexane-1,3-dione