Botanical Information Dioscorea oppositifolia L. (procuring samples)

Synonyms Dioscorea opposita Thunb.
Dioscorea oppositifolia var. dukhunensis Prain & Burkill
Dioscorea oppositifolia var. linnaei Prain & Burkill
Dioscorea oppositifolia var. thwaitesii Prain & Burkill
Common name (en) Common yam

Sample preparation To 0.5 g of the powdered herbal drug add 5 mL of methanol. Sonicate for 10 min. Centrifuge and use the supernatant
Mobile phase Water, methanol, methylene chloride 8:40:52 (v/v/v)
Derivatization Treat with anisaldehyde solution, heat at 100 °C for 3 min, allow to cool for 10 min and examine