Abietane diterpenoids from Caryopteris incana (Thunb.) Miq.

12 new diterpenes including 4 new rearranged abietanes caryopincaolide A–D with unprecedented skeletons have been isolated, together with 28 known diterpenes. Some possess DPP-IV inhibitory effects, several also exhibit significant levels of cytotoxicity, and one shows induction of apoptosis in Hey and A-549 cells.