methyl (2R,3R)-(3-t-butoxycarbonylamino-2,5-dimethyl-3,4-dihydro-2H-pyran-6-yl)acetate

(3R,4R,5S,7S)-4-t-butyldimethylsilyloxy-7-methoxy-7-methyl-1,6-dioxaspiro[2.5]octane-5-carbaldehyde

(3R,4R,5R,7S)-(4-hydroxy-7-methoxy-7-methyl-1,6-dioxaspiro[2.5]oct-5-yl)methyl pivalate

(3R,4R,5R,7S)-(4-t-butyldimethylsilyloxy-7-methoxy-7-methyl-1,6-dioxaspiro[2.5]oct-5-yl)methanol

(3R,4R,5R,7S)-(4-t-butyldimethylsilyloxy-7-methoxy-7-methyl-1,6-dioxaspiro[2.5]oct-5-yl)methyl pivalate