c-2-Methoxy-3,3-dimethyl-r-1-cyclopropancarbonsaeure-methylester

4-methoxy-3-methoxycarbonyl-2,5,5-trimethyl-4,5-dihydrofuran

1-Acetyl-3-methoxy-2,2-dimethyl-cyclopropanecarboxylic acid methyl ester

(1S,2R)-2-(3-Chloro-phenyl)-1-methoxycarbonylamino-cyclopropanecarboxylic acid

(1R,2S)-2-Isopropyl-1-methoxycarbonylamino-cyclopropanecarboxylic acid