(1R,2R,3S,5R,6R)-2-Amino-3-[bis-(4-chloro-phenyl)-methoxy]-6-fluoro-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester
(1R,2R,3S,5R,6R)-2-Amino-3-(3,4-dichloro-benzyloxy)-6-fluoro-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester
(1R,2R,3R,5R,6R)-2-(tert-butoxycarbonylamino)-3-(3,4-dichlorobenzoylamino)-6-fluorobicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester
(1R,2R,3R,5R,6R)-2-(tert-butoxycarbonylamino)-3-(3,4-dichlorobenzylamino)-6-fluorobicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester
(1R,2R,3R,5R,6R)-2-(tert-butoxycarbonylamino)-3-[(3,4-dichlorobenzyl)(methyl)amino]-6-fluorobicyclo[3.1.0]hexane-2,6-dicarboxylic acid diethyl ester