New Cadinane‐Type Sesquiterpenes from the Roots of Taiwania cryptomerioides Hayata

Six new cadinane‐type sesquiterpenes, (1β,4β,5α,10α)‐1,4‐epoxymuurolan‐5‐ol (1), (4α,10β)‐4,10‐dihydroxycadin‐1(6)‐en‐5‐one (2), (2β,3α,4β,6β)‐2,3‐dihydroxycadin‐1(10)‐en‐5‐one (3), (2β,3α)‐α‐corocalene‐2,3‐diol (4), (7S)‐α‐calacoren‐14‐ol (5), and (8β,9β,10β)‐8,9‐epoxycalamenene‐3,10‐diol (6) together with one known compound, (8β,9β,10β)‐8,9‐epoxycalamenen‐10‐ol (7), were isolated from the roots of Taiwania cryptomerioides. The structures of the new constituents were essentially elucidated by spectral evidence.