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In the title compound, C 20 H 27 NO 6 , the amide moiety is essentially planar, with a maximum deviation of 0.073 (3) Å, and one of the N -methyl groups shows rotational disorder. The five-membered 1,3-dioxolane ring adopts an envelope form, with the C atom bonded to the olefin side chain as the flap, which deviates from the mean plane through the other four atoms by 0.564 (7) Å. The 1,3-dioxole ring fused to the benzene ring adopts a flattened envelope form, with the C atom between the two O atoms as the flap, which deviates from the mean plane through the other four atoms by 0.215 (7) Å. The C-C=C-C olefin moiety is essentially planar and makes a dihedral angle of 87.1 (3)° with the benzene ring. An intra-molecular O-H⋯O hydrogen bond supports the mol-ecular conformation, enclosing an S (11) graph-set motif. In the crystal, inter-molecular C-H⋯O hydrogen bonding links the mol-ecules into a tape running along the b axis. Furthermore, other weak C-H⋯O hydrogen bonds and a C-H⋯π inter-action connect the tapes into a sheet structure parallel to (100).

acta crystallographica. section e, crystallographic communications

Crystal structure of (–)-(R,E)-3-(1,3-benzodioxol-5-yl)-5-[(4S,5R)-5-hydroxymethyl-2,2-dimethyl-1,3-dioxolan-4-yl]-N,N-dimethylpent-4-enamide