Phytochemical Characteristics, Free Radical Scavenging Activities, and Neuroprotection of Five Medicinal Plant Extracts

Table 1

Extraction yield and total phenolic, flavonoid, triterpenoid, and tannin content of the methanol extracts for five medicinal plants.

Medicinal name	Extraction yield^a	Total phenolic content^b	Total flavonoid content^c	Total triterpenoid content^d	Total tannin content^e
Spatholobus suberectus	4.6 ± 0.5	532.6 ± 15.5	1137.4 ± 15.6	45.7 ± 1.4	42.6 ± 1.4
Uncaria rhynchophylla	2.8 ± 0.2	242.7 ± 8.4	410.9 ± 7.6	61.3 ± 3.7	57.0 ± 2.2
Alpinia officinarum	4.8 ± 0.3	376.8 ± 5.5	659.5 ± 10.4	109.8 ± 5.6	45.4 ± 1.2
Drynaria fortunei	5.8 ± 0.4	241.7 ± 6.5	393.0 ± 2.2	35.2 ± 2.4	13.7 ± 0.8
Crataegus pinnatifida	22.0 ± 1.1	599.0 ± 16.0	472.4 ± 11.5	1.7 ± 0.2	35.0 ± 3.6

The data are presented as mean ± SD for three replicates.
^a% w/w.
^bmg gallic acid/g extract.
^cmg quercetin/g extract.
^dmg ursolic acid/g extract.
^e%/mg extract.