[A new steroidal glycoside from fermented leaves of Agave americana].
OBJECTIVE
To investigate the constituents of fermented leaves of Agave americana, and discover new compounds.


METHODS
Compounds were purified with silica gel and C8 reverse--phase silica gel column chromatography. The structures were elucidated by chemical and spectroscopic evidence.


RESULTS
Three steroidal compounds were obtained and their structures were identified as (25R)-5 alpha-spirostan-3 beta, 6 alpha, 23 alpha-triol 6-O-beta-D-glucopyranoside(1), (25R)-5 alpha-spirostan-3 beta, 6 alpha, 23 alpha-triol-3, 6-di-O-beta-D-glucopyranoside (cantalasaponin-1) (2) and (25R)-5 alpha-spirostan-3 beta, 6 alpha, 23 alpha-triol(hongguanggenin) (3).


CONCLUSIONS
Compound 1 is new compound, named agamenoside C.
Jin
Jian-ming
JM
State Key Laboratory of Phytochemistry and Western Plant Resources in China.
Liu
Xi-kui
XK
Yang
Chong-ren
CR
D027882:Agave / Q000737:chemistry*; D005285:Fermentation; D006027:Glycosides / Q000302:isolation & purification; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D006027:Glycosides; D014315:Triterpenes; C477183:agamenoside C