6-[[4-Formyl-8a-[3-hydroxy-4-[4-hydroxy-6-methyl-3,5-bis[[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy]oxan-2-yl]oxy-6-methyl-5-(3,4,5-trihydroxyoxan-2-yl)oxyoxan-2-yl]oxycarbonyl-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-5-hydroxy-4-[4-hydroxy-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-5-(3,4,5-trihydroxyoxan-2-yl)oxyoxan-2-yl]oxy-3-(3,4,5-trihydroxy-6-methyloxan-2-yl)oxyoxane-2-carboxylic acid