(2S,1'S)-2-(1'-tert-butoxycarbonyl-undecyl)-5-oxo-tetrahydrofuran-2-carboxylic acid methyl ester

(2S,1'S)-2-(1'-tert-butoxycarbonyl-undec-3'-enyl)-5-oxo-2,5-dihydrofuran-2-carboxylic acid methyl ester

1,1-diiodooctane

5-triisopropylsilanyloxy-furan-2-carboxylic acid methyl ester

(2S,1'S)-2-(1'-tert-butoxycarbonyl-3'-oxo-propyl)-5-oxo-2,5-dihydrofuran-2-carboxylic acid methyl ester