Calocetriol (1), diacetylcalocediol (2), and ferrugimenthenol (3) were isolated from the bark of Calocedrus macrolepis var. formosana. Among them, 1 and 2 are secoabietane-type diterpenoids, and 3, with a novel C 20-C 10 skeleton, is classified as a meroterpenoid. The structures of 1-3 were elucidated by spectroscopic analyses, and their biological activities were also evaluated. Compound 3 exhibited significant cytotoxic activity against human oral epidermoid carcinoma KB cells with an IC 50 value of 9.0±0.1 μM.
- Calocedrus macrolepis var. formosana
- Cytotoxic activity
ASJC Scopus subject areas
- Molecular Biology
- Molecular Medicine