were consistent with the presence of these constituent units. The ESIMS of 9 showed an ion peak [M + Na]+ at m/z 1593, corresponding to the molecular formula shown above. This is the same as that of hirtellin E (4), which was also composed of the same constituent units.9 Although a close resemblance was observed among the proton signals of 9 and those reported for 4,9 a large chemical shift difference (∆δH 1.44) between the C-6 methylene glucose-1 proton signals (rather than the corresponding one for glucose-2 as in 4) indicated placement of the HHDP group in 9 at the glucose-1 O-4/O-6. The placements of the acyl groups on the glucose cores in 9 were substantiated by the HMBC correlations among aromatic and glucose proton signals through three-bond couplings with carbonyl carbons, as illustrated by the arrows in formula 9 (Figure 2). The S configuration of the HHDP group in 9