35811-09-7 4-Methylacetophenonhelveticosid [German] 5-beta-Card-20(22)-enolide, 3-beta-((2,6-dideoxy-3,4-O-(alpha,p-dimethylbenzylidene)-beta-D-ribo-hexopyranosyl)oxy)-5,14-dihydroxy-19-oxo-