ethyl (+)-(R)-2-{(2R,3R,6S)-6-[(R)-1-(benzyloxy)propan-2-yl]-3-methyltetrahydro-2H-pyran-2-yl}propanoate

ethyl (-)-(S)-2-{(2R,3R,6S)-6-[(R)-1-(benzyloxy)propan-2-yl]-3-methyltetrahydro-2H-pyran-2-yl}propanoate