Diethyl cyclopropane-1,1-dicarboxylate

Cyclopropane-1,1-dicarboxylic acid

Diethyl cyclobutane-1,1-dicarboxylate

Cyclopentane-1,1-dicarboxylic acid

N-(4-Methoxybenzyl)hydroxylaMine

O-(Tetrahydropyran-2-yl)-hydroxylamine
