Two new ent-kaurane diterpenoids, xerophilusin E (1) and xerophilusin F (2), were isolated from the leaves of Isodon xerophilus. Their structures were determined as 3, 20: 7, 20-diepoxy-ent-kaur-16-en-15-one and 7 bet...Two new ent-kaurane diterpenoids, xerophilusin E (1) and xerophilusin F (2), were isolated from the leaves of Isodon xerophilus. Their structures were determined as 3, 20: 7, 20-diepoxy-ent-kaur-16-en-15-one and 7 beta, 14 beta, 20 (R)-trihydroxy-11 beta-acetoxy-7,20-cyclo-ent-kaur-16-en-6, 15-dione, respectively, by spectral methods and X-ray crystallographic analysis.展开更多
Arthrinins E-G(1-3),three new sesquiterpenoids possessing non-isoprenoid botryane skeleton,were isolated from the fermentation of an endophytic fungus named Arthrinium sp.HS66 which colonized in the stems of Isodon xe...Arthrinins E-G(1-3),three new sesquiterpenoids possessing non-isoprenoid botryane skeleton,were isolated from the fermentation of an endophytic fungus named Arthrinium sp.HS66 which colonized in the stems of Isodon xerophilus.Their structures were determined by extensive spectroscopic methods.Furthermore,the structure of 1 was unambiguously confirmed by X-ray diffraction,while those of 2 and 3 were verified through quantum chemical calculation of NMR data and ECD spectra.展开更多
文摘Two new ent-kaurane diterpenoids, xerophilusin E (1) and xerophilusin F (2), were isolated from the leaves of Isodon xerophilus. Their structures were determined as 3, 20: 7, 20-diepoxy-ent-kaur-16-en-15-one and 7 beta, 14 beta, 20 (R)-trihydroxy-11 beta-acetoxy-7,20-cyclo-ent-kaur-16-en-6, 15-dione, respectively, by spectral methods and X-ray crystallographic analysis.
基金supported financially by the National Natural Science Foundation of China(No.81874298)the CAS“Light of West China”program(Pema-Tenzin Puno)the Yunnan Science Fund for Distinguished Young Scholars(2019FJ002).
文摘Arthrinins E-G(1-3),three new sesquiterpenoids possessing non-isoprenoid botryane skeleton,were isolated from the fermentation of an endophytic fungus named Arthrinium sp.HS66 which colonized in the stems of Isodon xerophilus.Their structures were determined by extensive spectroscopic methods.Furthermore,the structure of 1 was unambiguously confirmed by X-ray diffraction,while those of 2 and 3 were verified through quantum chemical calculation of NMR data and ECD spectra.
