Novel Substituted Thiophenes and Sulf-Polyacetylene Ester from L.

Three new substituted bithiophenes (⁻), and one new sulf-polyacetylene ester, ritroyne A () were isolated from the whole plant of together with twelve known substituted thiophenes. The structures were elucidated on the basis of extensive spectroscopic analysis including 1D and 2D NMR as well as MS. Furthermore, the absolute configuration of ritroyne A () was established by computational methods.