The ester linkage of another acyl group to C-4 and C-6 of the glucose moiety was similarly identified on the basis of the HMBC correlation between H-4 and H-6 and the ester carbonyl carbons (Figure 4).
The ester linkage of another acyl group to C-4 and C-6 of theglucose moiety was similarly identified on the basis of the HMBCcorrelation between H-4 and H-6 and the ester carbonyl carbons(Figure 4).