Novel sesquiterpene-neolignans, eudesobovatos A (1) and B (2), eudesmagnolol (3), eudeshonokiols A (4) and B (5), clovanemagnolol (6), and caryolanemagnolol (7), have been isolated from the bark of Magnoliaobovata. Their structures were elucidated to be sesquiterpenes (eudesmol, 4, 4, 8-trimethyltricyclo [6.3. 1.02, 5] dodecane-1, 9-diol, and clovanediol) combined through ether bond with neolignans such as obovatol, honokiol, ...