Mi estas kortugite goja havi gancon esprimimian gratulon al la 1-a Azia Kongreso de Es-peranto. Estas la konkreta frukto de la dauraklopodo de Komisiono pri Azia Esperanto-Movado,oficiala komisiono de Universala Es-pe...Mi estas kortugite goja havi gancon esprimimian gratulon al la 1-a Azia Kongreso de Es-peranto. Estas la konkreta frukto de la dauraklopodo de Komisiono pri Azia Esperanto-Movado,oficiala komisiono de Universala Es-peranto-Asocio,stirigita kaj kunordigita de en-erria samideano s-ro TAKEUTI Yosikazu.展开更多
The synthesis of 14-epi-19-nor-22-oxa-1α,25(OH)2D3 5 was started from diol 8 via Fall's method, oxidation, epimerization, protection, coupling with the 19-nor-A-ring 7, and then deprotection of the hydroxyl functi...The synthesis of 14-epi-19-nor-22-oxa-1α,25(OH)2D3 5 was started from diol 8 via Fall's method, oxidation, epimerization, protection, coupling with the 19-nor-A-ring 7, and then deprotection of the hydroxyl functions.展开更多
Nor-1α, 25-dihydroxy-22-oxo-vitamin D3 4 was synthesized by the coupling of known compound 5 and the A-ring phosphine oxide 6 followed by deprotection of the hydroxy functions.
Two new sterols were isolated from bulbs of Bolbostemma paniculatum (Maxim.) Franquet. Their structures were elucidated as stigmasta-7, 22, 25-triene-3-O-nonadecanoic acid ester (1) and stigmasta-7, 22, 25-triene-3-O-...Two new sterols were isolated from bulbs of Bolbostemma paniculatum (Maxim.) Franquet. Their structures were elucidated as stigmasta-7, 22, 25-triene-3-O-nonadecanoic acid ester (1) and stigmasta-7, 22, 25-triene-3-O-B-D- (6'-palmitoyl) glucopyranoside (2) by chemical and spectroscopic methods.展开更多
Two new lanosta triterpenoids, 3 beta,22 a -dihydroxy-lanosta-8,24E-diene-25-peroxide 3 beta,22 a,25-trihydroxy lanosta-8,24E-diene were isolated from the petroleum ether extracts of Fuscoporia obliqua and their struc...Two new lanosta triterpenoids, 3 beta,22 a -dihydroxy-lanosta-8,24E-diene-25-peroxide 3 beta,22 a,25-trihydroxy lanosta-8,24E-diene were isolated from the petroleum ether extracts of Fuscoporia obliqua and their structures had been determined by spectral data, chemical method and X-ray crystallographic analysis.展开更多
文摘Mi estas kortugite goja havi gancon esprimimian gratulon al la 1-a Azia Kongreso de Es-peranto. Estas la konkreta frukto de la dauraklopodo de Komisiono pri Azia Esperanto-Movado,oficiala komisiono de Universala Es-peranto-Asocio,stirigita kaj kunordigita de en-erria samideano s-ro TAKEUTI Yosikazu.
文摘The synthesis of 14-epi-19-nor-22-oxa-1α,25(OH)2D3 5 was started from diol 8 via Fall's method, oxidation, epimerization, protection, coupling with the 19-nor-A-ring 7, and then deprotection of the hydroxyl functions.
基金Financial support from the National Natural Science foundation of China (No: 29972013) is gratefully acknowledged.
文摘Nor-1α, 25-dihydroxy-22-oxo-vitamin D3 4 was synthesized by the coupling of known compound 5 and the A-ring phosphine oxide 6 followed by deprotection of the hydroxy functions.
文摘Two new sterols were isolated from bulbs of Bolbostemma paniculatum (Maxim.) Franquet. Their structures were elucidated as stigmasta-7, 22, 25-triene-3-O-nonadecanoic acid ester (1) and stigmasta-7, 22, 25-triene-3-O-B-D- (6'-palmitoyl) glucopyranoside (2) by chemical and spectroscopic methods.
文摘Two new lanosta triterpenoids, 3 beta,22 a -dihydroxy-lanosta-8,24E-diene-25-peroxide 3 beta,22 a,25-trihydroxy lanosta-8,24E-diene were isolated from the petroleum ether extracts of Fuscoporia obliqua and their structures had been determined by spectral data, chemical method and X-ray crystallographic analysis.