3β-tert-butyldimethylsilyloxy-10α-trimethoxysilyloxy-1,5,7αH,4,6,11βH-guaian-6,12-olide

2-Oxo-propionic acid (2S,3S,3aS,4R,8R,8aR)-2-(tert-butyl-dimethyl-silanyloxy)-3,8-dimethyl-5-oxo-8-trimethylsilanyloxy-decahydro-azulen-4-yl ester

3β-tert-butyldimethylsilyloxy-11β-hydroxy-10α-trimethoxysilyloxy-1,5,7αH,4,6,11βH-guaian-6,12-olide

10α-acetoxy-1,7α,5,6,11βH-guaia-3-en-6,12-olide

2-((5R,8R,8aR)-8-Acetoxy-3,8-dimethyl-2-oxo-1,2,4,5,6,7,8,8a-octahydro-azulen-5-yl)-propionic acid methyl ester