期刊
JOURNAL OF NATURAL PRODUCTS
卷 82, 期 2, 页码 205-210出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jnatprod.8b00541
关键词
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资金
- JSPS KAKENHI [JP18KK0165]
- World Class Professor Program from the Ministry of Research, Technology and Higher Education of the Republic of Indonesia [123.3/D2.3/KP/2018]
Three new compounds, namely, 4-(4'-hydroxy-3'-methoxyphenyl)-3,5,7-trihydroxycoumarin (1) and sulawesins A (2) and B (3), were isolated from the propolis of stingless bees (Tetragonula aff. biroi) collected on South Sulawesi, Indonesia. In addition, five known compounds, glyasperin A, broussoflavonol F, (2S)-5,7-dihydroxy-4'-methoxy-8-prenylflavanone, (1'S)-2-trans,4-trans-abscisic acid, and (1'S)-2-cis,4-trans-abscisic acid, were identified. The structures of the new compounds were determined by a combination of methods that included mass spectrometry and NMR spectroscopy. The absolute configuration of sulawesin A (2), a new podophyllotoxin derivative, was determined by X-ray crystallography. The absolute configuration of sulawesin B (3) was also determined by the ECD calculation. 4-(4'-Hydroxy-3'-methoxyphenyl)-3,5,7-trihydroxycoumarin (1) and sulawesin A (2) were examined for xanthine oxidase (XO) inhibitory activity; 1 exhibited XO inhibitory activity, with an IC50 value of 3.9 mu M.
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