From: Preliminary study of the antioxidant properties of flowers and roots of Pyrostegia venusta (Ker Gawl) Miers
S.No.
Constituents
Methanol extract
Flower
Root
1
Alkaloids
• Dragendorff's test
++
2
Terpenes and steroids
• Salkowski test
• Libarman- Burchard's test
3
Tannins
• FeCl3 test
• Gelatin test
4
Saponins
-
• Frothing test