4-oxo-brefeldin A

(2S,4S,6R)-6-[((Z,6S)-6-[1-(tert-butyl)-1,1-dimethylsilyl]oxy-1-heptenyl)-2-(4-methoxyphenyl)-1,3-dioxan-4-yl]methyl-4-methylbenzenesulfonate

(Z,8S)-8-[1-(tert-butyl)-1,1-dimethylsilyl]oxy-1-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-3-nonen-2-one

(E)-4-{(1R,2S,4S)-2-[(E)-(S)-6-(tert-Butyl-dimethyl-silanyloxy)-hept-1-enyl]-4-methoxymethoxy-cyclopentyl}-4-hydroxy-but-2-enoic acid ethyl ester

{(1R,2R)-2-[(E)-(S)-6-(tert-Butyl-dimethyl-silanyloxy)-hept-1-enyl]-4-oxo-cyclopentyl}-acetonitrile