Phytochemistry p. 133 - 136 (1997)
Update date:2022-08-23
Topics:
Tosa, Hideki
Iinuma, Munekazu
Murakami, Koh-Ichi
Ito, Tetsuro
Tanaka, Toshiyuki
Chelladurai, Veliah
Riswan, Soedarsono
From the stem of Poeciloneuron pauciflorum, two new xanthones (1,6- dihydroxy-7-methoxyxanthone and 1,6-dihydroxy-7-methoxyxanthone 6-O-β-D- glucoside) in addition to 12 known compounds (1,5-dihydroxy-, 1,5-dihydroxy- 3-methoxy-, 1,7-dihydroxy-, 1-hydroxy-7-methoxy-, 2-methoxy-, 4-methoxy-, 1,4,5-trihydroxy-, 1,3,5-trihydroxy-, 1,3,6-trihydroxy-7-methoxy-, 1,3,7- trihydroxy-, 3-hydroxy-2-methoxyxanthone and (-)-epicatechin) were isolated. From the aerial paris (stems and bark) of Mammea acuminata, a new xanthone (2,7-dihydroxyxanthone) was isolated in addition to two known xanthones (1,5- dihydroxy- and 5-hydroxy-1-methoxyxanthone) and (-)-epicatechin. The structures were established by spectral analysis and total synthesis in case of 1,6-dihydroxy-7-methoxyxanthone.
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