A new 12,17-cyclo-labdane diterpenoid from the twigs of <i>Dacrycarpus imbricatus</i>

<p>A new 12,17-cyclo-labdane diterpenoid, podoimbricatin C (<b>1</b>), along with 15 known compounds was isolated from the twigs of <i>Dacrycarpus imbricatus</i>. Their structures were elucidated by means of extensive spectroscopic analysis. Compound <b>1</b> is the second example of the unusual 12,17-cyclo-labdane diterpenoids. It showed no inhibitory effects against five human tumour lines (HL-60, SMMC-7721, A-549, MCF-7 and SW-480).</p>