As a part of an ongoing search for novel antioxidants from the salt marsh plants, bioactivity-isolation and structure determination of constituents from Salicornia herbacea were performed. One new triterpenoid saponin (4), along with three known saponins (1-3), has been isolated from n-BuOH fraction of S. herbacea. On the basis of the spectroscopic methods, the structure of the new saponin 4 was elucidated as 3β-hydroxy-23-oxo-30-noroleana-12, 20(29)-diene-28-oic acid 3-O-β-D-glucuronopyranosyl-28-O-β-d-glucopyranoside. Scavenging effects of saponins 1-4 were examined on 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical and peroxynitrite. Particularly, saponin 3 exerted significant antioxidant activity on both authentic peroxynitrite and peroxynitrite generated from morpholinosydnonimine (SIN-1).

译文

:作为对盐沼植物中新型抗氧化剂进行持续搜索的一部分,生物活性的分离和结构测定来自柳叶草(Salicornia herbacea)的成分。一种新的三萜皂苷(4),以及三种已知的皂苷(1-3),已从S. herbacea的n-BuOH馏分中分离出来。在光谱学方法的基础上,阐明了新的皂苷4的结构为3β-羟基-23-氧代-30-noroleana-12、20(29)-二烯-28-油酸3-O-β-D -葡萄糖醛酸吡喃糖基-28-O-β-d-吡喃葡萄糖苷。研究了皂苷1-4对1,1-二苯基-2-吡啶基-肼基(DPPH)自由基和过氧亚硝酸盐的清除作用。特别地,皂苷3对纯正亚硝酸盐和由吗啉代亚砜亚胺(SIN-1)产生的过氧亚硝酸盐均具有显着的抗氧化活性。

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