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In the structure of the title compound, C30H40O6S, the cyclo-hexene and heterocyclic rings are linked by a double bond. The cyclo-hexene ring has a half-chair conformation (the methyl-ene group adjacent to the hy-droxy substituent lies above the remaining atoms) and the hy-droxy and eth-oxy groups have equatorial and bis-ectional dispositions, respectively. The heterocyclic ring has an envelope conformation (with the CMe2 C atom being the flap). The dihedral angle between the aromatic rings is 53.88 (10)°. A long intra-molecular C-H⋯S inter-action is noted. In the mol-ecular packing, hy-droxy-O-H⋯O(sulfonate) hydrogen bonds lead to a helical chain along [010]. Connections between chains are of the type methyl-C-H⋯O(sulfonate) and lead to supra-molecular layers that lie parallel to (001). The studied crystal was an inversion twin.

acta crystallographica. section e, crystallographic communications

Crystal structure of (9S,10S)-10-ethoxy-9-hydroxy-6,6,9-trimethyl-3-pentyl-7,8,9,10-tetrahydro-6H-benzo[c]chromen-1-yl 4-methylbenzenesulfonate