benzyl 2-((2R,6S)-6-((R)-2-(benzyloxy)pent-4-en-1-yl)tetrahydro-2H-pyran-2-yl)-2-methylpropanoate

benzyl 2-methyl-2-((2R,6S)-6-(2-oxoethyl)tetrahydro-2H-pyran-2-yl)propanoate

benzyl 2-((2R,6S)-6-((S)-2-(benzyloxy)-4-oxobutyl)tetrahydro-2H-pyran-2-yl)-2-methylpropanoate

benzyl 2-((2R,6S)-6-((2R,4R,5S)-2-(benzyloxy)-4-hydroxy-5-methylhept-6-en-1-yl)tetrahydro-2H-pyran-2-yl)-2-methylpropanoate