Paper Chromatographic Studies of the Tropolones of some Cupressaceae in Formosa

Zavarin‐Anderson paper chromatographic method was applied to identify the tropolonic constituents in the extracts of heartwood from four species of Formosan Cupresssaceae . The presence of α‐and β‐thujaplicin in Chamaecyparis Taiwanensis, β ‐ thujaplicin in C hamaecy paris formosensis, β ‐ and γ‐ thujaplicin in Libocedrus formosana and α‐ , β ‐ thujaplicin and nootkatin in Juniperus formosana was confirmed.