Bufadienolides from bulbs of Urginea lydenburgensis (Hyacinthaceae: Urgineoideae)

The bufadienolides, 16β-acetoxy-3β, 14β-dihydroxy-19-formyl-bufa-4,20,22-trienolide (16β-acetoxy-berscillogenin) and 4β,8β,11α,14β-tetrahydroxybufa-5,20,22-trienolide-12-one, 2α,3β-O-glycoside (lydenburgenin) (1) were isolated from the poisonous geophyte Urginea lydenburgensis.