Five condensed furanocoumarins from the root of Heracleum candicans Wall.

Three new spirotrifuranocoumarins, canditririns C-E (1-3), a new spirotetrafuranocoumarin, canditetrarin A (4), and a new tetrafuranocoumarin, canditetrarin B (5), were isolated from the roots of Heracleum candicans Wall. Their structures were established using spectral methods.