Two new phenolic constituents from the Aconitum pendulum Busch roots.

Two new phenolic compounds aconitol A (1) and B (2), together with three known compounds including one phenolic constituent (3) and two diterpenoid alkaloids (4-5), were isolated from the roots of Aconitum pendulum. Their structures were assigned by HRESIMS, extensive spectral methods and compared with literature data. All obtained compounds (1-5) were tested for their inhibitory activity against NO production in LPS-activated RAW 264.7 macrophages. Compound 1 and 5 showed moderate inhibitory effects.