The chemical Vincetoxicoside B has a known molecular formula of C21-H20-O11. Synonyms may include: Quercetin 7-rhamnoside, 7-((6-Deoxy-alpha-L-mannopyranosyl)oxy)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-4H-benzopyran-4-one, Quercetin-7-alpha-L-rhamnoside, 7-Rhamnosylquercetin (ChemID).