Author/Authors :
Hitotsuyanagi، نويسنده , , Yukio and Matsumoto، نويسنده , , Yuji C. Sasaki، نويسنده , , Shinichi and Yamaguchi، نويسنده , , Kentaro and Itokawa، نويسنده , , Hideji and Takeya، نويسنده , , Koichi، نويسنده ,
Abstract :
[d-Ala-4]RA-VII (9) and [d-Ala-2]RA-VII (10) were prepared from RA-VII (1), an anti-tumour bicyclic hexapeptide from Rubia plants, by conversion of its thioamide 3 into oxazoles 4 and 5 and subsequent acid-catalysed hydrolysis.
