title: Two Novel Spirostene Glycosides from Selaginella chrysocaulos and their Chemotaxonomic Significance.
abstract: During an investigation of the Indian heterosporous fern Selaginella chrysocaulos, two novel C28 spirostene monosides, chrysocauloside A and B were identified. Chrysocauloside A (1β,3β-dihydroxy-20S,22R-spirost-5-ene-1-yl β-D-glucopyranoside) and chrysocauloside B (1β,3β-dihydroxy-20S,22R-spirost-5-ene-1-yl β-D-galactopyranoside) are O-glycosylated at C-1 and each bear a methyl group at C-24 and C-25. Spectroscopic (NMR) and MS data for the new compounds are given and the taxonomic significance of the occurrence of spirostenes in the group of Lycophyta is discussed.
authors.forename: Olaf
authors.initials: O
authors.lastname: Kunert
authors.forename: Rumalla Chidananda
authors.initials: RC
authors.lastname: Swamy
authors.forename: Bobbala Ravi
authors.initials: BR
authors.lastname: Kumar
authors.forename: Achanta Venkata Narasimha Appa
authors.initials: AV
authors.lastname: Rao
authors.forename: Owi Ivar
authors.initials: OI
authors.lastname: Nandi
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schuehly
mesh_terms: D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000737:chemistry*; D032503:Selaginellaceae / Q000737:chemistry*; D013150:Spirostans / Q000737:chemistry*
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D013150:Spirostans