p. 5841 - 5842
(2007/10/02)11β,12α-Diacetoxy-3-(tert-butyldimethylsiloxy)-13,20-epoxy-16-hydroxy-2-oxopicras-3-en-21-oic Acid Methyl Ester
3,11β,12α-Triacetoxy-13,20-epoxy-15β,16-dihydroxy-2-oxopicras-3-en-21-oic Acid Methyl Ester
3,11β,12α-Triacetoxy-13,20-epoxy-16-hydroxy-2-oxopicras-3-en-21-oic Acid Methyl Ester
11β,12α-Diacetoxy-3-(tert-butyldimethylsiloxy)-13,20-epoxy-2,16-dioxopicras-3-en-21-oic Acid Methyl Ester
3,11β,12α-Triacetoxy-13,20-epoxy-2,16-dioxopicras-3-en-21-oic Acid Methyl Ester