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A new limonoid named rohituka-15 1,with a known limonoid dregeana-1 2,was isolated from the seed of Aphanamixis polystachya (Meliaceae).The 13C NMR data assignment of dregeana-1 2 and the structural elucidation of the new compound 1 were based on spectral analysis including 1H-1H COSY,HMQC and HMBC experiments.