[Chemical constituents from Cinnamomi Ramulus decoction].

Six compounds were isolated from the ethyl acetate extracts of Cinnamomi Ramulus decoction by RP-18, silica gel, Sephadex LH-20 column chromatography, together with prep-HPLC methods. Based on HR-ESI-MS, MS, 1D and 2D NMR spectral analyses, the structures of the six compounds were identified as 4,5,10,11-tetrahydroxybisabol-7-ene(1), 4,5,10,11-tetrahydroxybisabolin(2), 1-phenyl-1,2,3-glycerol(3),(+)-lyoniresinol(4), benzoic acid(5), and decumbic acid(6). Compound 1 was a new bisabolene-type sesquiterpene, and compounds 2 and 3 were isolated from the Cinnamomi Ramulus for the first time. Moreover, the bisabolene-type sesquiterpene(2) was assayed for its anti-inflammatory activity and cytotoxicity to human pancreatic cancer cells(PANC-1 cells). RESULTS:: showed that compound 2 exhibited an inhibitory rate of 32.9% on nitric oxide(NO) at a dose of 40 μmol·L~(-1) and a proliferation inhibition rate of 14.5% against PANC-1 cells at a dose of 20 μmol·L~(-1). It did not demonstrate significant activity.