Two new (E)-2-amino-2-butenoic acid (Dhb)-containing microcystins isolated from Oscillatoria agardhii

被引:63
作者
Sano, T [1 ]
Kaya, K [1 ]
机构
[1] Natl Inst Environm Studies, Environm Chem Div, Tsukuba, Ibaraki 305, Japan
关键词
D O I
10.1016/S0040-4020(97)10291-5
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Two new 2-amino-2-butenoic acid (Dhb)-containing microcystins (Dhb-microcystins), [D-Asp(3), (E)-Dhb(7)]microcystin-LR (1) and -HtyR (2), were isolated from Oscillatoria agardhii. The structures were elucidated by the extensive NMR analyses and confirmed by mass spectral and amino acid analyses. The absolute configuration was determined by chemical degradation and chiral GC analyses. The configuration of the Dhb unit of 1 and 2 was determined as E by ROESY experiments. (C) 1997 Elsevier Science Ltd. All rights reserved.
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页码:463 / 470
页数:8
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