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目的:研究帽蕊木茎皮的化学成分。方法:采用硅胶柱层析、ODS、Sephadex LH-20及RP-HPLC等多种色谱分离方法对其化学成分进行研究,综合运用~1H-NMR、~(13)C-NMR及MS等波谱学方法对化合物进行结构鉴定。结果:从帽蕊木茎皮中分离得到8个三萜类化合物,分别鉴定为:(3β)-3-(β-D-quinovopyranosyloxy)pyrocincholic acidβ-D-glucopyranosyl ester(1)、3-O-β-D-葡萄糖喹诺酸(2)、喹诺酸(3)、3-O-β-6-deoxyglucopyranosyl-quinovic acid28-O-β-glucopyranosyl ester(4)、3-O-β-6-deoxyglucopyranosyl-cincholic acid 28-O-β-glucopyranosyl ester(5)、3-O-β-Dglucopyranosyl-pyrocincholate(6)、3β,19α-dihydroxy-6-oxo-olean-12-en-28-oic acid(7)、6β,19α-dihydroxy-3-oxo-24-norurs-12-en-28-oic acid(8)。结论:其中,化合物1、5~8为首次从该属植物中分离得到,化合物1、5~8为首次从该植物中分离得到。
Objective: To study the chemical composition of bark core bark. Methods: The chemical constituents were studied by silica gel column chromatography, ODS, Sephadex LH-20 and RP-HPLC. The chemical constituents were identified by 1H-NMR, 13C-NMR and MS spectroscopy Methods The compounds were identified by their structures. Results: Eight triterpenoids were isolated from the stem bark of Brassica juncea and identified as (3β) -3- (β-D-quinovopyranosyloxy) pyrocincholic acid β-D-glucopyranosyl ester 3-O-β-6-deoxyglucopyranosyl-quinovic acid 28-O-β-glucopyranosyl ester (4) deoxyglucopyranosyl-cincholic acid 28-O-β-glucopyranosyl ester (5), 3-O-β-Dglucopyranosyl-pyrocincholate (6), 3β, 19α-dihydroxy-6-oxo-olean- 12-en-28-oic acid 7), 6β, 19α-dihydroxy-3-oxo-24-norurs-12-en-28-oic acid (8). Conclusion: Among them, compounds 1, 5 ~ 8 were isolated from this genus for the first time, and compounds 1, 5 ~ 8 were isolated from this plant for the first time.