(E)-(R)-4-[(2R,5R,6S)-6-Ethoxy-5-(3-methyl-but-2-enyl)-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methyl-but-2-enoic acid ethyl ester

(2S,3S)-2-methyl-3-(triisopropylsilyloxy)butanal

(E)-(R)-4-{(3aR,4R,7S,7aR)-2,2-Dimethyl-7-[2-(1-phenyl-1H-tetrazole-5-sulfonyl)-ethyl]-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-yl}-3-methyl-4-triisopropylsilanyloxy-but-2-enoic acid ethyl ester

(E)-(R)-3-Methyl-4-{(2R,5R)-5-[2-(1-phenyl-1H-tetrazole-5-sulfonyl)-ethyl]-5,6-dihydro-2H-pyran-2-yl}-4-triisopropylsilanyloxy-but-2-enoic acid ethyl ester