作者:Nobuharu Shigematsu、Kenichi Hayashi、Natsuko Kayakiri、Shigehiro Takase、Masashi Hashimoto、Hirokazu Tanaka
DOI:10.1021/jo00053a032
日期:1993.1
A novel tachykinin antagonist WS9326A was isolated from Streptomyces violaceoniger no. 9326. It is an acylated macrocyclic heptapeptide lactone consisting Of L-Thr, (E)-dehydro-N-methyltyrosine ((E)-DELTAMeTYr), L-Leu, D-Phe, L-alloThr, L-Asn, L-Ser, and 3-[2-(1(Z)-pentenyl)phenyl]-2(E)-propenoic acid. Its structure, including absolute stereochemistry, was unequivocally determined as 1 on the basis of chemical and spectroscopic evidence. The spectroscopic investigations were carried out mainly with 2, the triacetyl derivative of WS9326A. This is the first example of a tachykinin antagonist isolated from a natural source.