[Diterpenoid alkaloids from Delphinium kamaonense var. glabrescens]

A new and a known diterpenoid alkaloid have been isolated from the root of Delphinium kamaonense var. glabrescens. The chemical structure of the new alkaloid, named glabredelphine, was established as 2(3)-dehydro-6-demethyl-18-demethoxy-delcosine by IR, MS, 1HNMR and 13CNMR spectral data. The known one was identified as tatsiensine. They were isolated from this plant for the first time.