Chemical Constituents of Murraya tetramera Huang and Their Repellent Activity against Tribolium castaneum.

Sixteen compounds were isolated from the leaves and stems of Huang. Based on the NMR and MS spectral results, the structures were determined. It was confirmed that the isolated compounds included three new compounds (, and ) and one new natural product (), which were identified asmurratetra A (), murratetra B (), murratetra C () and [2-(7-methoxy-2-oxochromen-8-yl)-3-methylbut-2-enyl]3-methylbut-2-enoate (), respectively. Meanwhile, the repellent activity against was investigated for 13 of these isolated compounds. The results showed that the tested compounds had various levels of repellent activity against . Among them, compounds (4(15)-eudesmene-1β,6α-diol), (isoferulic acid) and (2,3-dihydroxypropyl hexadecanoate) showed fair repellent activity against . They might be considered as potential leading compounds for the development of natural repellents.