A new lignan, 9'-methoxypinoresinol (1), and two new glycosylated 5-hydroxymethylfurfurals, calofurfuralside A (2), and calofurfuralside B (3), together with nine known compounds (4-12) have been isolated from the active fractions, CHCl (IC, 0.32μgmL) and EtOAc (IC, 0.55μgmL) fractions of the leaves of Calotropis gigantea. Their structures were elucidated based on NMR and MS data. Among the isolated compounds, compounds 1 and 9 exhibited potent cytotoxicity against PANC-1 human pancreatic cancer cell line under the normoglycemic condition with IC values of 3.7 and 3.3μM, respectively. 9'-Methoxypinoresinol (1) significantly inhibited the colony formation of PANC-1 cells in a concentration-dependent manner.
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| http://dx.doi.org/10.1016/j.bmcl.2017.04.087 | DOI Listing |
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