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Ethyl 3,9-dihydroxy-9-methyl-7-phenyl-7,8,10-trihydro-6H-dibenzo[b,d]pyran-6-one-8-carboxylate(C23H22O6,Mr = 394.42) has been synthesized and its structure was determined by 1H and 13C NMR,ESI-MS,elemental analysis,and X-ray single-crystal diffraction.The