tert-butyl (2-(((2R,4aR,6S,7S,8R,8aS)-8-hydroxy-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-7-yl)amino)-2-oxoethyl)carbamate

tert-butyl ((R)-2-(((2R,4aR,6S,7S,8R,8aS)-8-hydroxy-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-7-yl)amino)-2-oxo-1-phenylethyl)carbamate

(2R,4aR,6S,7S,8R,8aS)-7-((S)-2-((tert-butoxycarbonyl)amino)-3-methylbutanethioamido)-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-8-yl benzoate

(2R,4aR,6S,7S,8R,8aS)-7-((R)-2-((tert-butoxycarbonyl)amino)-2-phenylethanethioamido)-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-8-yl benzoate