(-)-Filicinoside B 156857-60-2 26-O-beta-D-Glucopyranosyl-3-O-beta-D-glucopyranosyl-5beta-furostan-3beta,22alpha,26-triol Filicinoside B beta-D-Glucopyranoside, (3beta,5beta,22alpha,25S)-22-hydroxyfurostan-3,26-diyl bis-