Journal
PHYTOCHEMISTRY
Volume 196, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2021.113074
Keywords
Pterolobium macropterum; Leguminosae; Cassane diterpenes; Pterolobirins; Nitric oxide production
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Funding
- Second Century Fund (C2F), Chulalongkorn University
- TRSI Fund [CU_FRB640001_01_23_2]
- Ratchadapisek Sompoch Endowment Fund, Chulalongkorn University [CU-GR_63_161_23_27]
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Eight new cassane diterpenes, pterolobirins C-J, along with two known analogs, were isolated from the roots of Pterolobium macropterum. The structure of pterolobirin J was confirmed by X-ray diffraction analysis. Pterolobirin E and sucutinirane C exhibited significant inhibition of nitric oxide production.
Eight undescribed cassane diterpenes, pterolobirins C-J, together with two known analogs, were isolated from the roots of Pterolobium macropterum. Their structures were characterized by extensive spectroscopic techniques including NMR, MS, ECD and X-ray crystallographic spectroscopy. The absolute configuration of pterolobirin J was confirmed by single-crystal X-ray diffraction data. The compounds were screened for their anti-inflammatory activity on the lipopolysaccharide (LPS) induced nitric oxide (NO) production in J774. A1 macrophage cells. Pterolobirin E and sucutinirane C displayed good NO inhibition with IC50 values of 24.44 +/- 1.34 and 19.16 +/- 1.22 mu M, respectively.
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