Anticomplement compounds from Polygonum chinense

Five new compounds including two phenyldilactones (1, 2), two coumarins (3, 4) and a dimer of N-E-feruloyl tyramine (5) together with twenty-three known compounds (6–28) were isolated from a medicinal plant Polygonum chinense. The structures of the new compounds were established by detailed spectral analysis. The absolute configurations of 1 and 5 were elucidated by Mosher’s method, Mo2(OAc)4-induced electronic circular dichroism (ECD) data, and...