The structure of cyanoginosin-LA (previously referred to by us as toxin BE-4) is cyclo(-D-Ala-L-Leu-erythro-β-methyl-D-isoAsp-L-Ala-Adda-D-Glu-N-methyldehydroAla)(17a), where Adda refers to the novel β-amino acid residue of 3-amino-9-methoxy-2,6,8-trimethyl-10-phenyldeca-4,6-dienoic acid (11). The connectivity of Adda is deduced from ¹H- and ¹³C-n.m.r. data, but the stereochemistry at carbons 2,3,8, and 9 remains unknown. The residue sequence is derived from the mass spectra of cyclic and linear derivatives of the toxin. A new nomenclature for the related toxins of Microcystis aeruginosa is discussed.

中文翻译：

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铜绿微囊藻的环状七肽毒素花青素-LA的结构

cyanoginosin-LA的结构（先前由我们称为毒素BE-4）是环（ - d -Ala-大号-Leu-赤-β甲基d -isoAsp-大号-Ala-Adda- d -Glu- N-甲基脱氢Ala）（17a），其中Adda是指3-氨基-9-甲氧基-2,6,8-三甲基-10-苯基癸-4,6-二烯酸的新的β-氨基酸残基（11）。从¹ H和¹³推导出Adda的连通性Cn.mr数据，但在碳2、3、8和9处的立体化学仍然未知。残基序列是从毒素的环状和线性衍生物的质谱中得出的。讨论了铜绿微囊藻相关毒素的新命名法。