A new eremophilane sesquiterpenoid, along with two known ones, was isolated from the ethyl acetate soluble fraction of the aerial part of Coleus xanthanthus C. Y. Wu et Y. C. Huang. Their structures were elucidate...A new eremophilane sesquiterpenoid, along with two known ones, was isolated from the ethyl acetate soluble fraction of the aerial part of Coleus xanthanthus C. Y. Wu et Y. C. Huang. Their structures were elucidated as 4,5,11_trimethyl_8,9_seco_1(10),7(11)_eremophiladien_8,12_olid_9_oic acid (1), 2,9_dioxoeuryopsin (2) and 9_oxoeuryopsin (3) by spectral methods. The 1H_NMR and 13 C NMR data of compounds 1, 2 and 3 were unambiguously assigned on the basis of two_dimensional NMR spectroscopy.展开更多
Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The struct...Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The structure of 1 was elucidated by modern spectroscopicmethods, especially by X-ray diffraction.展开更多
文摘A new eremophilane sesquiterpenoid, along with two known ones, was isolated from the ethyl acetate soluble fraction of the aerial part of Coleus xanthanthus C. Y. Wu et Y. C. Huang. Their structures were elucidated as 4,5,11_trimethyl_8,9_seco_1(10),7(11)_eremophiladien_8,12_olid_9_oic acid (1), 2,9_dioxoeuryopsin (2) and 9_oxoeuryopsin (3) by spectral methods. The 1H_NMR and 13 C NMR data of compounds 1, 2 and 3 were unambiguously assigned on the basis of two_dimensional NMR spectroscopy.
文摘Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The structure of 1 was elucidated by modern spectroscopicmethods, especially by X-ray diffraction.