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Two Novel A-seco-Rearranged Lanostane Triterpenoids From Abies Sachalinensis
Sun, Bohang,Hou, Bailing,Huang, Jian,Wu, Lijun,Kuroyanagi, Masonori,Gao, Huiyuan 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.12
Further chemical study led to two new A-seco-rearranged lanostane triterpenoid derivatives (1-2) and one known compound Abiesanolide C (3) from the ethyl acetate (EtOAc) soluble fraction of the MeOH extract of Abies sachalinensis needles. The new compounds were identified as 3,4-seco-8-($14{\rightarrow}13R$)abeo-17, l3-friedo-$9{\beta}$-lanosta-4(28), 7, 14, 24-tetraen- 26,23-olide-23-hydroxy-3-oic acid and methyl-3,4-seco-8-($14{\rightarrow}13R$) abeo-17,13-friedo-$9{\beta}$-lanosta-4(28), 7, 14, 24-tetraen-26,23-olide-23-hydroxy-3-oate, respectively. Structural determination of these compounds were carried out by the spectral studies especially by the two digital (2D)-NMR and high-resolution (HR)-MS experiences.
Two Novel A-seco-Rearranged Lanostane Triterpenoids From Abies Sachalinensis
Bohang Sun,Bailing Hou,Jian Huang,Lijun Wu,Masonori Kuroyanagi,Huiyuan Gao 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.12
Further chemical study led to two new A-seco-rearranged lanostane triterpenoid derivatives (1-2) and one known compound Abiesanolide C (3) from the ethyl acetate (EtOAc) soluble fraction of the MeOH extract of Abies sachalinensis needles. The new compounds were identified as 3,4-seco-8-(14→13R)abeo-17,13-friedo-9β-lanosta-4(28), 7, 14, 24-tetraen-26,23-olide-23-hydroxy-3-oic acid and methyl-3,4-seco-8-(14→13R) abeo-17,13-friedo-9β-lanosta-4(28), 7, 14, 24-tetraen-26,23-olide-23- hydroxy-3-oate, respectively. Structural determination of these compounds were carried out by the spectral studies especially by the two digital (2D)-NMR and high-resolution (HR)-MS experiences.
Hongxiu Liu,Bohang Sun 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
Virtual reality means that people use the computer to visualize complex data and real-time interaction. In this paper, the authors proposed a 3D geological modeling for slope engineering by using Non-Uniform Rational B-Splines (NURBS) surface function. By analyzing the commonly used 3D data structure, we construct a 3D solid modeling of complex slope, which combined with the advantages of NURBS surface and B-Rep entity. The results show that the realization of 3D geological visualization can be used as the decision basis for the slope engineering construction. At the same time, the author analyzed the greening slope that could prevent water and soil loss, and put forward the importance of slope greening protection from the view of ecological protection.