title: Aferoside A, a steroidal saponin from Costus afer.
abstract: A new steroidal saponin, aferoside A, has been isolated from the roots of Costus afer. Its structure was established as 3-O-([beta-D-apiofuranosyl-(1-->2)]-[alpha-L-rhamnopyranosyl-(1--> 4)]-beta-D-glucopyranosyl)-25(R)-spirost-5-en-3 beta-ol by chemical transformations and various spectroscopic methods, mainly 2D NMR techniques (COSY, HMQC and HMBC).
authors.affiliation: Laboratoire de Pharmacognosie, Faculté de Pharmacie, Université de Bourgogne, Dijon, France.
authors.forename: R C
authors.initials: RC
authors.lastname: Lin
authors.forename: B
authors.initials: B
authors.lastname: Hanquet
authors.forename: M A
authors.initials: MA
authors.lastname: Lacaille-Dubois
mesh_terms: D002236:Carbohydrate Conformation; D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013150:Spirostans
chemical_list: D012503:Saponins; D013150:Spirostans; C103663:aferoside A