From the roots of Helicteres angustifolia, collected from Anhui province, two triterpenoids of oleanolic acid type were obtained and were identified as new compounds, methyl 3β-hydroxyolean-12-en-27-benzoyloxy-28-oat...From the roots of Helicteres angustifolia, collected from Anhui province, two triterpenoids of oleanolic acid type were obtained and were identified as new compounds, methyl 3β-hydroxyolean-12-en-27-benzoyloxy-28-oate(1) and 3β-O-(p-hydroxy-(E)-cinnamoyl)-12 oleanen-28-oic acid(2). The variety of spectroscopic methods such as IR, HRMS, EIMS, H-H COSY, H-C COSY NMR have been applied in the structural elucidation of these two compounds.展开更多
文摘From the roots of Helicteres angustifolia, collected from Anhui province, two triterpenoids of oleanolic acid type were obtained and were identified as new compounds, methyl 3β-hydroxyolean-12-en-27-benzoyloxy-28-oate(1) and 3β-O-(p-hydroxy-(E)-cinnamoyl)-12 oleanen-28-oic acid(2). The variety of spectroscopic methods such as IR, HRMS, EIMS, H-H COSY, H-C COSY NMR have been applied in the structural elucidation of these two compounds.
