Detailed analysis of the 2D HSQC, HMBC, and COSY NMR data established 1 as the 2′-O-desmethyl analogue of 3. Given the high degree of similarity in NMR data between 1 and 3, similar specific rotations, and a likely biosynthetic relationship between the two metabolites, we tentatively propose the absolute configuration of 1 to be the same as 3.