Studies on Nepalese crude drugs. XXI. On the diterpenoid constituents of the aerial part of Scutellaria discolor COLEBR.

Studies on Nepalese crude drugs. XXI. On the diterpenoid constituents of the aerial part of Scutellaria discolor COLEBR.
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DOI:
10.1248/cpb.44.1540
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发表时间:
1996-08
影响因子:
1.7
通讯作者:
A. Ohno;H. Kizu;T. Tomimori
A. Ohno;H. Kizu;T. Tomimori
中科院分区:
医学4区
文献类型:
--
作者:
A. Ohno;H. Kizu;T. Tomimori

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从异色紫藤地上部分分得8个新的新克罗烷二萜(化合物3,4,6,8,9,10,11,12),以及克罗定、二氢克罗定-1、克罗定半缩醛(14-hydro-15β-hydroxyclerodin)、jodrellin A、黄芩素、角鲨烯、24-亚甲基环木菠萝烷醇和3-表油酸与3-表熊果酸的混合物。新化合物的结构经光谱和化学方法确定为:3,15β-乙氧基-14-羟基克罗定,4,15α-乙氧基-14-羟基克罗定,6,(6α)-19-O-乙酰基-4,18:11,16:15,16-三环氧新克罗烷-6,15,19-三醇(6-O-去乙酰基-14-氢-15-羟基克罗定); 8,6α-O-乙酰基-2,19:4,18:11,16:15,16-四环氧基-14-新癸烯-6,19-二醇(19-O-去乙酰基乔德林A); 9、10、11和12,分别为6α-O-乙酰基-15 β,19 β-二O-乙基、6α-O-乙酰基-15 α,19 β-二O-乙基、6α-O-乙酰基-19 β-O-乙基和6α,19-二O-乙酰基-2,19::4,18:11,16:15,16-四环氧新克罗烷-6,15,19-三醇。
From the aerial part of Scutellaria discolor, eight new neoclerodane diterpenes (compounds 3, 4, 6, 8, 9, 10, 11 and 12) were isolated together with clerodin, dihydroclerodin-1, clerodin hemiacetal (14-hydro-15β-hydroxyclerodin), jodrellin A, scutaltisin, squalene, 24-methylenecycloartanol and a mixture of 3-epioleanolic acid and 3-epiursolic acid. The structures of new compounds were determined by spectroscopic and chemical methods as follows : 3, 15β-ethoxy-14-hydroclerodin ; 4, 15α-ethoxy-14-hydroclerodin ; 6, (6α)-19-O-acetyl-4,18 :11,16 :15,16-triepoxyneoclerodane-6,15,19-triol (6-O-deacetyl-14-hydro-15-hydroxyclerodin) ; 8, 6α-O-acetyl-2,19 :4,18 :11,16 : 15,16-tetraepoxy-14-neoclerodene-6,19-diol (19-O-deacetyljodrellin A) ; 9, 10, 11 and 12, 6α-O-acetyl-15β,19β-diO-ethyl-, 6α-O-acetyl-15α,19β-di-O-ethyl-, 6α-O-acetyl-19β-O-ethyl- and 6α,19-di-O-acetyl-2,19 : :4,18 :11,16 : 15,16-tetraepoxyneoclerodane-6,15,19-triol, respectively.