(2S,3R,4S,5S,6R)-2-(4-((E)-3,5-Dimethoxystyryl)phenoxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol

CAS 38967-99-6

Pterostilbene glucoside connects a sugar to a stilbene framework through a phenolic oxygen. Two methoxy groups sit on the other aromatic ring. That pattern distinguishes it from polydatin, whose corresponding groups are hydroxyls. The E in the systematic name describes the double-bond geometry, while other descriptors specify spatial arrangements in the sugar ring. An exact mass alone does not settle these details. A reference document links the supplied structure to this CAS, but evidence about the free aglycone should not be transferred to the glucoside. Breaking the sugar linkage and measuring the resulting compound also answers a different question from measuring the original substance intact. The long name is therefore useful because it identifies what an analytical comparison needs to distinguish.