Aglaia pachyphylla is a species from the Aglaia genus (Meliaceae) and the chemical constituent has not been widely explored. A new cycloartane-type triterpenoid, pachyphyllanone (1), along with four known compounds (2-5) were isolated from Aglaia pachyphylla Miq. Furthermore, the structure of the new compound was elucidated by the interpretation of spectroscopic data, including 1D and 2D-NMR, as well as ECD and NMR calculations (DP4+ analysis). Compounds 1-5 showed cytotoxic activities against MCF-7 with IC50 values ranging from 160.74 to 299.75 μM.
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