STEROIDS OF THE SPIROSTAN AND FUROSTAN SERIES FROM PLANTS OF THE GENUS Allium. XXI. STRUCTURE OF ALLIOSPIROSIDE A AND ALLIOFUROSIDE A FROM Allium cepa

Article abstract of DOI:10.1007/BF00574733

Two new steroid glycosides have been isolated from the generative organs (pericarps and peduncles) of Allium cepa L.: alliospiroside A and alliofuroside A.According to chemical transformations and spectral characteristics, alliospiroside A has the structure of (25S)-spirost-5-ene-1β,3β-diol 1-O- 2)-α-L-arabinopyranoside>.The structure of (25S)-furost-5-ene-1β,3β,22α,26-tetraol 20-O-β-D-glucopyranoside 1-O- 2)-α-L-arabinopyranoside> has been established for alliofuroside A.