(E)-(R)-6-[(2S,4R,6S,8S,9R)-4-(tert-Butyl-dimethyl-silanyloxy)-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl]-2,4-dimethyl-hex-4-enal

2-[(E)-3-(Diphenyl-phosphinoyl)-1-methyl-propenyl]-4-methoxy-5-methyl-benzoic acid methyl ester

Propionic acid (S)-1-((2S,4S,6R,8R,9S)-4-benzyloxy-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-ylmethyl)-2-methyl-allyl ester

Propionic acid (R)-1-((2S,4S,6R,8R,9S)-4-benzyloxy-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-ylmethyl)-2-methyl-allyl ester