title: A new steroidal saponin from the leaves of Agave americana.
abstract: A new bisdesmosidic spirostanol saponin, along with three known saponins, were isolated from Agave americana (Agavaceae). The structure of the new saponin was elucidated as (25R)-3 beta,6 alpha-dihydroxy-5 alpha-spirostan-12-one 3,6-di-O-beta-D-glucopyranoside. Among the isolated saponins, hecogenin tetraglycoside showed cytotoxic activity against HL-60 human promyelocytic leukemia cells with an IC50 value of 4.3 micrograms/mL.
authors.forename: A
authors.initials: A
authors.lastname: Yokosuka
authors.forename: Y
authors.initials: Y
authors.lastname: Mimaki
authors.forename: M
authors.initials: M
authors.lastname: Kuroda
authors.forename: Y
authors.initials: Y
authors.lastname: Sashida
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification*; D002240:Carbohydrate Sequence; D018922:HL-60 Cells; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013150:Spirostans
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D012503:Saponins; D013150:Spirostans; C412409:dihydroxy-spirostan-12-one 3,6-di-O-glucopyranoside