Methanesulfonic acid (1R,2R,3S,4S)-2-benzyloxy-5-(tert-butyl-diphenyl-silanyloxy)-1-(R)-1,4-dioxa-spiro[4.5]dec-2-yl-3-methoxy-4-methyl-pentyl ester

(S)-4-[3-Methoxy-4-methyl-5-oxo-5H-furan-(2Z)-ylidene]-3-methyl-butyraldehyde

Methanesulfonic acid (S)-4-(tert-butyl-diphenyl-silanyloxy)-1-(3-methoxy-4-methyl-5-oxo-2,5-dihydro-furan-2-yl)-2-methyl-butyl ester

5-[(S)-4-Hydroxy-2-methyl-but-(Z)-ylidene]-4-methoxy-3-methyl-5H-furan-2-one

(1'R,2R,3'S,3a'S,5'S,7a'S)-5'-((E)-5-(furan-3-yl)-2-methylpent-1-en-1-yl)-1'-hydroxy-3-methoxy-3',4,7'-trimethyl-1',2',3',3a',5',7a'-hexahydro-5H-spiro[furan-2,4'-inden]-5-one