The syntaxonomic diversity of mountain tundra vegetation within the axial part Polar Urals is described. We distinguished 5 associations and 3 subassociations assigned to classes phytosociological classification. 4 are described for first time: Pediculari lapponicae–Betuletum nanae ass. nov., Dactylino arcticae–Empetretum subholarctici nov. Br yocaulo diverg entis–Vaccinietum uliginosi solorine...

Phytochemical investigation of the 70% EtOH extract of the leaves of Alstonia scholaris afforded seven new monoterpenoid indole alkaloids: scholarisins I-VII (1-7), and three known compounds: (3R,5S,7R,15R,16R,19E)-scholarisine F (8), 3-epi-dihydro- corymine (9), and (E)-16-formyl-5α-methoxystrictamine (10). Structural elucidation of all the compounds was accomplished by spectral methods such a...