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Phytochemical investigation of the methanol extract of the bark of Cryptomeria japonica has led to the isolation of two new abietane-type diterpenoids, 7a-(2’-butoxyethoxy)deoxocryptojaponol (1) and 7p-(2’-butoxyethoxy)deoxocryptojaponol (2). Their structures were established by means of 1D and 2D NMR spectra and HR-EI-MS, as well as on comparison with the reported data.

Phytochemical investigation of the methanol extract of the wood of Cunninghamia konishii resulted in the isolation of two new acidic labdane-type diterpenoids, 12( S)-hydroxy-15,16-epoxylabda-8(17),13-dien-19-oic acid (1) and 12( S)-hydroxy-15,16-epoxylabda-8(17),13-dien-18-oic acid (2), along with one known labdane-type diterpene, 7,13 E-labdadien-15-ol (3). Their structures were determined by analysis of spectroscopic data and comparison with the data of known analogues.

Aconitum carmichaeli Debx. is a traditional Chinese medicine commonly employed for curing a wide array of diseases in East Asia. From the ethyl acetate soluble fraction of the methanolic extracts of A carmichaeli, a new alkaloid, aconitamide (1), along with eighteen known compounds 2–19 were isolated by column chromatography and identified on the basis of spectroscopic analyses. The anti-telomerase activity of 1–19 was also assessed, but no activity was found, even at a concentration higher than 30 μM.

Two new lignans, (8 S,8′ S)-4,3′-dihydroxy-3,4′,5′-trimethoxylignan-9′,9-olide (1) and trans–4′,8,8′-trihydroxy-3′-methoxy-3,4-methylenedioxylignan-9′,9-olide (2), were isolated from the wood of Cunninghamia konishii. Their structures were determined by analysis of spectroscopic data.