1,4-Di-tert-butyl (2R,3R)-2-({(2E)-3-[4-(acet­yloxy)phen­yl]prop-2-eno­yl}­oxy)-3-hy­droxy­butane­dioate

The title compound, C(23)H(30)O(9), has an approximate T-shape with the tert-butyl ester groups lying either side of the benzene ring. The acetyl group is almost perpendicular to the benzene ring to which it is connected [C—C—O—C torsion angle = −106.7 (3)°]. The conformation about the C=C double bond [1.331 (4) Å] is E. Linear supra­molecular chains along the a axis mediated by hy­droxy–carbonyl O—H⋯O hydrogen bonds feature in the crystal packing. The same H atom is also involved in an intra­molecular O—H⋯O inter­action.