3-[7-(tert-butyldiphenylsilanyloxy)-5-hydroxy-2,2-dimethyl-hexahydrobenzo[1,3]dioxol-5-yl]propionitrile

3,4-isopropylidenequinide

methyl (-)-3,4-O-isopropylidene-5-O-(tert-butyldiphenylsilyl)quinate