489-28-1Relevant academic research and scientific papers
Sesquiterpene constituents of the liverwort Calypogeia muelleriana
Warmers, Ute,Wihstutz, Kolja,Buelow, Nils,Fricke, Christiane,Koenig, Wilfried A.
, p. 1723 - 1731 (2007/10/03)
The lipophilic constituents of the liverwort Calypogeia muelleriana were investigated. A new sesquiterpene hydrocarbon, maali-1,3-diene, and two sesquiterpene alcohols with an aromadendrane skeleton, 3-hydroxyledene and 4,5-dehydroviridiflorol, were isolated and identified. The structure elucidation was carried out mainly by NMR spectroscopic techniques (1H-, 13C-, 1H1H-COSY-, HMQC-, HMBC- and NOESY experiments). The majority of the constituents of the liverwort volatiles show a conspicuous biogeneric relationship, which becomes even more obvious in the stereochemical correlations.
Metabolites from the Marine Sponge Epipolasis kushimotoensis
Tada, Haruhiko,Yasuda, Fumio
, p. 1941 - 1945 (2007/10/02)
Two isothiocyanates,epipolasin-A 1 and -B 2,and two corresponding thiourea derivatives,epipolasinthiourea-A 14 and -B 15, were isolated from the marine sponge E.kushimotoensis.Their structures were elucidated on the basis of chemical and spectral evidence.The thioureas 14 and 15 showed cell growth inhibition activity.Keywords-sponge;Epipolasis kushimotoensis;epipolasin-A,-B; epipolasinthiourea-A, -B; sesquiterpene; isothiocyanate; thiourea derivative; cell growth inhibition
