A novel ent-pimarane-type diterpenoid from Sigesbeckia glabrescens with anti-inflammatory activity
JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH(2022)
摘要
A novel ent-pimarane-type diterpenoid, sigesbeckia J (1), along with two known diterpenoids, siegesbeckia acid (2) and ent-18-acetoxy-16R,17-dihydroxykauran-19-oic acid (3), were isolated from the aerial parts of Sigesbeckia glabrescens Makino. Their chemical structures were elucidated based on extensive spectroscopic interpretation. The absolute configuration of ent-pimarane-type diterpenoid (1) was determined by comparing experimental and calculated ECD spectra. Compared with the positive control minocycline (IC50 32.84 mu M), compound 1 exhibited moderate cell growth anti-inflammatory activities in vitro by testing their inhibition of LPS-induced NO production in BV2 microglial cells, with IC50 value of 58.74 mu M.
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关键词
Sigesbeckia glabrescens, Compositae, ent-pimarane-type, diterpenoids, anti-inflammatory
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