N-(2-chloroethyl)-2-methoxy-6-methylbenzamide

(4S,1'Z)-1-tert-Butyldimethylsilyl-4-(2-benzyloxycarbonylethenyl)azetidin-2-one

(1'S,2'S,4S)-1-tert-Butyldimethylsilyl-4-(1,2-dihydroxy-2-benzyloxycarbonylethyl)azetidin-2-one

(1'S,2'S,4S)-1-tert-Butyldimethylsilyl-4-<1,2-(dimethylmethylenedioxy)-2-benzyloxycarbonylethyl>azetidin-2-one

(1'S,3S)-3-(1-Benzyloxycarbonylamino-3-methylbutyl)-3,4-dihydro-8-hydroxy-1H-2-benzopyran-1-one