A new spirostanol saponin, named chinenoside VI, was isolated from the bulbs of Allium chinense. On the basis of spectral data and chemical evidence, its structure was established as: 25 (R)-24-O-beta-D-glucopyranosyl...A new spirostanol saponin, named chinenoside VI, was isolated from the bulbs of Allium chinense. On the basis of spectral data and chemical evidence, its structure was established as: 25 (R)-24-O-beta-D-glucopyranosyl-3 beta, 24 beta-dihydroxy-5 alpha-spirost-3-O-alpha-L-arabinopyranosyl-(1 --> 6)-beta-D-glucopyranoside.展开更多
ICE core study is a forward interdiscipline research domain. Climatic and environmentalchanges in the past and the present can be reconstructed and monitored through ice core stud-ies. On the basis of analyzing the cl...ICE core study is a forward interdiscipline research domain. Climatic and environmentalchanges in the past and the present can be reconstructed and monitored through ice core stud-ies. On the basis of analyzing the climatic and environmental parameters recorded in ice cores,the characteristics of climatic and environmental changes in recent years or in the past展开更多
文摘A new spirostanol saponin, named chinenoside VI, was isolated from the bulbs of Allium chinense. On the basis of spectral data and chemical evidence, its structure was established as: 25 (R)-24-O-beta-D-glucopyranosyl-3 beta, 24 beta-dihydroxy-5 alpha-spirost-3-O-alpha-L-arabinopyranosyl-(1 --> 6)-beta-D-glucopyranoside.
文摘ICE core study is a forward interdiscipline research domain. Climatic and environmentalchanges in the past and the present can be reconstructed and monitored through ice core stud-ies. On the basis of analyzing the climatic and environmental parameters recorded in ice cores,the characteristics of climatic and environmental changes in recent years or in the past
