Journal of Natural Products 2008-06-01

Dihydroagarofuranoid sesquiterpenes, a lignan derivative, a benzenoid, and antitubercular constituents from the stem of Microtropis japonica.

Jih-Jung Chen, Chang-Syun Yang, Chien-Fang Peng, Ih-Sheng Chen, Chang-Ling Miaw

Index: J. Nat. Prod. 71 , 1016-21, (2008)

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Abstract

Four new compounds, including two new dihydroagarofuranoid sesquiterpenes, 8-benzoyloxymutangin (1) and 15-acetoxyorbiculin G (2), a new lignan derivative, 9,9'- O-di-(Z)-feruloyl-(-)-secoisolariciresinol (3), and a new benzenoid, 5'-methoxyevofolin B (4), have been isolated from the stem of Microtropis japonica, together with 20 known compounds (5- 24). 3-Ethoxy-4-hydroxybenzaldehyde (5) was identified from a natural source for the first time. The structures of these new compounds were determined through analyses of physical data. 15-Acetoxyorbiculin G (2), celahin C (6), and salasol A (7) exhibit antituberculosis activities (MICs < or = 39.6 microM) against Mycobacterium tuberculosis H 37Rv in vitro.