| Abstract: | Three new analogues of the arylethyl (= phenylethanoid) glycoside echinacoside ( 5 ), namely cistantubulosides A ( 1 ), B1/B2 ( 2a / 2b ), and C1/C2 ( 3a / 3b ), and one new oligosaccharide, cistantubulose A1/A2 ( 4a / 4b ), were isolated from the stems of Cistanche tubulosa (Schenk ) R. Wight , together with five known compounds, i.e., campneoside I, campneoside II ( 6 ), echinacoside ( 5 ), tubuloside, and cistanoside F. Among the compounds isolated, 2a / 2b, 3a / 3b, 4a / 4b , campneoside I, campneoside II ( 6 ), and cistanoside F each consisted of a pair of epimers. The structures of the new compounds were elucidated on the basis of spectral data. |
