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Tetranortriterpenoids from Clausena excavata
Author(s) -
He Hong Ping,
Zhang Jian Xin,
Shen Yue Mao,
He Yi Neng,
Chen Chang Xiang,
Hao Xiao Jiang
Publication year - 2002
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(200202)85:2<671::aid-hlca671>3.0.co;2-u
Subject(s) - chemistry , stereochemistry , rutaceae , moiety , genus , botany , biology
Five new tetranortriterpenoids, (11 β )‐21,23‐dihydro‐11,21‐dihydroxy‐23‐oxoobacunone (=21,23‐dihydro‐21‐hydroxy‐23‐oxozapoterin; 2 ), (11 β )‐21,23‐dihydro‐11,23‐dihydroxy‐21‐oxoobacunone (=21,23‐dihydro‐23‐hydroxy‐21‐oxozapoterin; 3 ), (1 α ,11 β )‐1,2,21,23‐tetrahydro‐1,11,23‐trihydroxy‐21‐oxoobacunone (=21,23‐dihydro‐23‐hydroxy‐21‐oxoclausenarin; 4 ), (1 α ,11 β )‐23‐ethoxy‐1,2,21,23‐tetrahydro‐1,11‐dihydroxy‐21‐oxoobacunone (=23‐ethoxy‐21,23‐dihydro‐21‐oxoclausenarin; 5 ); (11 β )‐1,2,21,23‐tetrahydro‐11,23‐dihydroxy‐21‐oxoobacunoic acid; 6 ), were isolated from the aerial part of Clausena excavata Burm. f. (Rutaceae). All compounds possessed 3,4‐seco skeletons. Their structures were established by spectroscopic studies. Tetranortriterpenoids with a 4‐hydroxybut‐2‐eno‐4‐lactone moiety are rarely found in the genus Clausena.