Abstract
Five new sesquiterpenoids, caulesyl acetate (II), 4-hydroxy-β-bulnesene (III), selina-3, 7(11)-dien-8-one (IV), selina-4(14), 7(11)-dien-8-one (V), and germacrone 4, 5-epoxide (VI), and four known sesquiterpenoids, germacratriene (VIII), β-selinene (IX), selina-3, 7(11)-dien (X), and germacrone (VII), were isolated from the essential oil of the subterranean part of Asarum caulescens (Aristolochiaceae). Structures of these substances were determined by chemical and spectroscopic evidences.
