| Popis: |
During investigations of the active principle of Urginea sanguinea Schinz eight bufadienolides, a steroidal sapogenin and stigmasterol were isolated. The compounds were identified by FAB-MS, 1H-NMR- and 13C-NMR-studies or comparison with authentic substances as scillirosidin (1), desacetylscillirosidin (2), 12β-hydroxy-scillirosidin (3), 12β-hydroxy-desacetyl-scillirosidin (4), 12β-hydroxy-scilliroside (5), 5α-4,5-dihydro-12β-hydroxy-scillirosidin (6), 12β-hydroxy-scillirosidin-3-one (7), 12β-hydroxy-scilli-rubrosidin-3-one (8) and 7β, 15α-dihydroxy-yamogenin (9). The latter is the first steroidal sapogenin isolated from an Urginea species. |
