New Diketopiperazine Derivatives Isolated from Sea Urchin-Derived Bacillus sp.
作者:Ken Yonezawa、Koji Yamada、Isao Kouno
DOI:10.1248/cpb.59.106
日期:——
Two new diketopiperazine derivatives, bacillusamides A (1) and B (2), have been isolated from the EtOAc extract of the sea urchin-derived Bacillus sp. along with the known cyclo(-L-pro-L-val-) (3), cyclo(-L-pro-L-tyr-) (4), cyclo(-L-pro-L-phe-) (5). These structures were elucidated by extensive spectroscopic methods. Furthermore, the absolute configurations of the amino acid residues were determined using Marfey's method. Compound 1 displayed weak antifungal activity against Aspergillus niger.
从源自海胆的芽孢杆菌(Bacillus sp.它们与已知的环(-<小>L小>-pro-<小>L小>-val-) (3)、环(-<小>L小>-pro-<小>L小>-tyr-) (4)、环(-<小>L小>-pro-<小>L小>-phe-) (5)一起被分离出来。这些结构是通过大量光谱方法阐明的。此外,还采用马菲法确定了氨基酸残基的绝对构型。化合物 1 对黑曲霉具有微弱的抗真菌活性。