P. Magiatis et al., Verbalactone, a new macrocyclic dimer lactone from the roots of Verbascum undulatum with antibacterial activity, J NAT PROD, 64(8), 2001, pp. 1093-1094
A novel macrocyclic dimer lactone, named verbalactone, was isolated from th
e roots of Verbascum undulatum and exhibited interesting antibacterial acti
vity. It is the first time that 1,7-dioxacyclododecane is reported as the r
ing system of a natural product. The structure and the absolute stereochemi
stry of the new compound were determined by spectral methods and chemical c
orrelation.