Two new actinidine-type monoterpene alkaloids, delavayines B (1) and C (2),
were isolated from the MeOH extract of the aerial parts of Incarvillea del
avayi, a close species of which, I. sinensis, Is used as an analgesic for r
heumatic pain in China, and the structures have been elucidated on the basi
s of spectroscopic evidence.