2H-Pyran-2-acetic acid, 6-[(1R)-1-[(2S,5R,7S,8R,9S)-2-[(2S,2′R,3′S,5R,5′R)-3′-[(2,6-dideoxy-3,4-di-O-methyl-β-L-arabino-hexopyranosyl)oxy]octahydro-2-methyl-5′-[(2S,3S,5R,6S)-tetrahydro-6-methoxy-3,5,6-trimethyl-2H-pyran-2-yl][2,2′-bifuran]-5-yl]-9-hydroxy-2,8-dimethyl-1,6-dioxaspiro[4.5]dec-7-yl]ethyl]tetrahydro-2-hydroxy-4,5-dimethoxy-3-methyl-, (2R,3S,4S,5R,6S)-