Podocarpane, isopimarane, and abietane diterpenoids from Isodon lophanthoides var. graciliflorus

► Four new diterpenoids isolated from Isodon lophanthoides var. graciliflorus. ► Graciliflorin D possessed a rearranged abietane skeleton. ► Cytotoxicity evaluated against three human carcinoma cell lines. ► Micranthin B showed in vitro cytotoxicity against all the tested cell lines.