Two new steroidal alkaloids from Veratrum nigrum var. ussuriense

Two new steroidal alkaloids, veraussines A (1) and B (2) were isolated from the roots and rhizomes of Veratrum nigrum var. ussuriense. Their structures were determined as N-(ethoxycarbonyl)-1α,2β,3α,15α-tetrahydroxy-5β-jervanin-12-en-11-one (1) and N-(methoxycarbonyl)-1α,2β,3α,15α-tetrahydroxy-5β-jervanin-12-en-11-one (2) by spectroscopic analysis.