(2S,3E,4S)-3-Ethylidene-3,4-dihydro-5-(methoxycarbonyl)-2-[(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)oxy]-2H-pyran-4-acetic Acid is an intermediate in synthesizing Oleocanthal (O524540). It is a compound of olive oil with potential use as anti-inflammatory and chemotherapeutic agents.