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1,1-Bis(hydroxymethyl)cyclopropane Methyl cyclopropane carboxylate ETHYL 1-METHYLCYCLOPROPANE-1-CARBOXYLATE Ethyl cyclopropanecarboxylate FEMA 3699 3-Ethoxy-2,2-dimethyl-3-oxopropanoic acid Cyclopropanecarboxylic acid 1,1-Cyclopropanedicarboxylic acid 2,2-Dimethyl-1,3-dioxane-4,6-dione 1,1-Cyclopropanedicarboxylic acid monomethyl ester