The isolation and identification of twenty-seven components from the leaves of Calocedrus formosana are described. Their structures were determined on the basis of spectral data as well as direct comparison with authentic samples. These compounds include a mixture of fatty acids, five benzenoids, two lignans, one sesquiterpene, fifteen diterpenoids, one steroid and two phaeophorbides. Some of these compounds exhibited cytotoxic activity.

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