Steroidal Glycosides from the Fresh Stem of Stephanotis lutchuensis var. japonica (Asclepiadaceae). Chemical Structures of Stephanosides A-J.

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  • Steroidal Glycosides from the Fresh Stem of Stephanotis lutchuensis var.japonica(Asclepiadaceae).Chemical Structures of Stephanosides K-Q
  • Steroidal Glycosides from the Fresh Ste

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The structures of ten related oxypregnane-oligoglycosides stephanosides A (1), B (2), C (3), D (4), E (5), F(6), G (7), H (8), I (9), and J (10) from the fresh stem of Stephanotis lutchuensis var. japonica (Asclepiadaceae)were elucidated on the basis of a detailed study of their high-field 1H- and 13C-NMR spectra. All the sugars are β (1→4)-linked and the aglycones are 12, 20 bis-O-acyl or 12-O-acyl derivatives of sarcostin.

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