United States Pharmacopeia (USP) Reference Standard Synonym(s): 5β,20(22)-Cardenolide-3β,14-diol-3-( O -2,6-dideoxy-β-D-ribo-hexopyranosyl-[1→4]- O -2,6-dideoxy-β-D-ribo-hexopyranosyl-[1→4]-2,6-dideoxy-β-D-ribo-hexopyranosyl)oxy Empirical Formula:...