A new pentacyclic triterpenoid, 3-oxo-urs-11,13(18)-dien-28-oic acid (), along with twelve known triterpenoids, -amyrin (), 19-hydroxy--amyrin (), triptohypol E (), uvaol (), 2,3-dihydroxyurs-11-en-13,28-olide (), 3-hydroxyurs-11-en-13,28-olide (), ursolic acid (), asiatic acid (), oleanolic acid (), aegiceradienol (), obtusalin () and betulinic acid () were isolated from the leaves of L. Their structures were established from spectroscopic data and comparison with reported values. Among them, compounds , , , and were isolated from the Ericaceae family for the first time. Compounds , , , and were obtained from for the first time. Additionally, compounds , and significantly inhibited the levels of NO in LPS-stimulated RAW 264.7 cells at 3 μM.
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