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organic compounds
In the structure of 1-hydroxy-1-propynyl-1,2,3,4-tetrahydronaphthalene-2-spiro-(2′-cyclohexen-4′-one), C18H18O2, the Csp2 atom at the spiro junction (axial) is trans to the propargyl chain (pseudo-axial). The crystal structure is stabilized by O-HO hydrogen bonds.