sesquiterpenoids, laurokamurols A–C (1–3), along with eight known related monomeric ones (4–11) were isolated from the East China Sea redalga Laurencia okamurai Yamada. The absolute configurations of the new bis-sesquitepenoids, especially their axial chirality, were determined by extensive spectroscopic analyses and TDDFT-ECD method. All of the new compounds showed promising PTP1B inhibitory activities with IC50
Abstract From the redalgaLaurencia nidifica a new sesquiterpene of cyclolaurane-type was isolated, and the structure elucidated by spectral analyses and chemical means.