Abstract
Four new furanoeremophilane-type sesquiterpenes, adenostylol (1a), adenostin A (2a), adenostin B (3a) and adenostylide (4a), were isolated from Cacalia adenostyloides MATSUM., along with eight known sesquiterpenes, cacalol (5), cacalolide (6), cacalone (7), epicacalone (8), adenostylone (9), neoadenostylone (10), 6β-propionyloxy-1, 10-dehydrofuranoeremophil-9-one (11) and tetrahydromaturinone (12). Of these compounds, 2a and 3a are novel-type dimers.
