Dehydrierung von Steroiden, XII. Über die Behandlung von Cholesterin mit Floridin

Sesquiterpenoids and Other Constituents from Senecio argunensis

“…The molecular formula was deduced to be C 15 C-NMR spectra of 2 were very similar to that of aphanamol II (2a).…”

“…6) As a part of our ongoing study on the finding antibacterial and antifungal sesquiterpenoids from poisonous plants scattered in northeast China, the lesser polar constituents of S. argunensis were systematically investigated. As a result, three new sesquiterpenoids, isodauc-7(14)-en-6a,10b-diol (1), 10b-hydroxyisodauc-6-en-14-al (2), and (7S*)-opposit-4(15)-en-1b,7-diol (4), along with nine known compounds, artabotrol (3), 7) (7R*)-opposit-4(15)-en-1b,7-diol (5), 8) opposit-4(15)-en-1b, 11-diol (6), 9) loliolide (7), 10) 5a,6a-epoxy-3b-hydroxymegastigm-7-en-9-one (8), 11) chromolaevane dione (9), 12) pregn-4-en-3,20-dione (10), 13) 12b-hydroxypregn-4-en-3,20-dione (11), 14) ergost-6,22-dien-3b,5a,8a-triol (12), 15) (23Z)-cycloart-23-en-3b,25-diol (13) 16) have been isolated from the aerial parts of this plant. This paper deals with the isolation and structure determination of three new constituents.…”

“…The molecular formula was determined to be C 15 (Fig. 1) allow to establish the basic skeleton of 1 to be isodaucane sesquiterpenoid, and to confirm the locations of functional groups.…”