Card-20(22)-enolide, 3-((o-2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1-4)-o-2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1,4)-2,6-dideoxy-beta-D-ribo-hexopyranosyl)oxy)-12,14,16-trihydroxy-, (3-beta,5-beta,12-beta,16-beta)-