Fig. 1

The chromatographic fingerprints and ABTS^+• inhibition profiles of Dihaung S07 (a) and Shu Dihuang P07 (b) at 334 nm and the partial chromatograms of the two samples at 250 nm. A partial chromatogram at 250 nm from 15.0 min to 21.0 min in chromatogram of Dihuang, a partial chromatogram at 250 nm from 12.0 min to 24.0 min in chromatogram of Shu Dihuang