The bark of Litsea costalis affords

The bark of Litsea costalis affords two new compounds named 4,40-diallyl-5,50-dimethoxy-[1,10-biphennyl]-
2,20-diol, biseugenol A (1) and 2,20-oxybis (4-allyl-1-methoxybenzene), biseugenol B (2) along with
two known compounds (3–4), namely 5-methoxy-2-Hydroxy Benzaldehyde (3), and (E)-4-styrylphenol
(4). The structures of 1 and 2 were determined using 1D and 2D NMR data. Also, the IR and NMR data
were combined with quantum chemical calculations in the DFT approach using the hybrid B3LYP
exchange–correlation function to confirm the structures of the compounds. Compounds showed fairly
potent anticancer activity against cell lines and antioxidant (DPPH).