(S)-4-((S)-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)(hydroxy)methyl)-2,2-dimethyl-1,3-dioxan-5-one

(+)-(2R,4S)-2-(tert-butyl)-4-[(2S)-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl](hydroxy)methyl]-2-methyl-1,3-dioxan-5-one

(-)-(2R,4S)-2-(tert-butyl)-4-[(2S)-(2R)-1,4-dioxaspiro[4.5]dec-2-yl(hydroxy)methyl]-2-methyl-1,3-dioxan-5-one

(+)-(2R,4S)-4-[(1S,2R)-2,3-bis(benzyloxy)-1-hydroxypropyl]-2-(tert-butyl)-2-methyl-1,3-dioxan-5-one

2,7-di-tert-butyl-1,2,3,3a,4,5-hexahydropyrene