Magnolignan A

Magn Reson Chem. 2008 May;46(5):497-500.

1H and 13C NMR assignments for two lignans from the heartwood of Streblus asper.[Pubmed: 18297743 ]

METHODS AND RESULTS:
In our ongoing investigation of the bioactive constituents from plants, two new lignans, Magnolignan A-2-O-beta-D-glucopyranoside and strebluslignanol were isolated from heartwood of Streblus asper, along with three known lignans, Magnolignan A, magnolol, and magnaldehyde D. 1D and 2D NMR experiments, including COSY, HMQC, and HMBC, and other spectroscopic methods, including UV, IR, and MS were used for the determination of the structures and NMR assignments.
CONCLUSIONS:
Primary bioassays showed that Magnolignan A-2-O-beta-D-glucopyranoside and strebluslignanol have medium cytotoxic activity against HEp-2 and HepG2 cells, with IC(50) of 13.3 microM, 46.4 microM and 10.1 microM, 21.7 microM, respectively.

Natural Medicines, 1999 , 53 :1-4.

The simple method of distinction between Japanese and Chinese magnolia bark by ion-pair high-performance liquid chromatography using photodiode array detector[Reference: WebLink]

To establish a simple method for making distinction between Japanese and Chinese magnolia barks, the components in both magnolia barks were analysed by ion-pair high performance liquid chromatography using a photodiode array detector. Methyleugenol and Magnolignan A were detected only in Chinese magnolia barks. The presence or absence, of these components distinguishes Japanese magnolia barks from Chinese magnolia barks. The amounts these components in Chinese magnolia barks were determined.