(Z)-4-[(2R,6S)-6-((E)-4-Oxo-pent-2-enyl)-5,6-dihydro-2H-pyran-2-yl]-but-2-enoic acid methyl ester

(Z)-4-[(2R,6S)-6-(2-Oxo-ethyl)-5,6-dihydro-2H-pyran-2-yl]-but-2-enoic acid methyl ester

lithium dimethylcuprate

(3Z,9E,14E)-(1R,7S,11S,17S)-11-(tert-Butyl-dimethyl-silanyloxy)-7-(tert-butyl-diphenyl-silanyloxymethyl)-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,14,19-tetraene-5,13-dione

(3S)-4-(tert-butyldiphenylsilanyloxy)-(4-methoxybenzyloxy) butyraldehyde