(1R,4S)-2-((3R,4S)-2,4-dimethyl-3-triisopropylsiloxymethylcyclohex-2-en-1-one-4-carbonyl)-4,7,7-trimethyl-2-azabicyclo[2.2.1]heptan-3-one

3-hydroxy-4,7a-dimethyl-6,7-dihydro-3H-2-benzofuran-1,5-dione

(3R,7aS)-4,7a-dimethyl-3-(((1S,2R,3R,4S)-4,7,7-trimethyl-3-(naphthalen-1-yl)bicyclo[2.2.1]heptan-2-yl)oxy)-7,7a-dihydroisobenzofuran-1,5(3H,6H)-dione

4-hydroxy-2-methyl-3-oxo-2-(3-oxopentyl)butanoic acid γ-lactone

(7aS)-5-hydroxy-4,7a-dimethyl-5,6,7,7a-tetrahydroisobenzofuran-1(3H)-one