HPLC-UV-ELSD analysis of AR. (A) HPLC-UV spectra of the standard; (B) HPLC-UV- ELSD spectra of the standard; (C) HPLC-UV spectra of the samples; (D) HPLC-UV-ELSD spectra of the samples. (1) Calycosin-7-O-β-D-glucoside; (2) Ononin; (3) (6aR, 11aR)-9,10-Di methoxyptercarpan; (4) 8, 2-Dihydroxy-3, 4-Dimethoxyisoflavan-7-O-β-D-glucopyranoside; (5) Calycosin; (6) Formononetin; (7) (6aR, 11aR)-3- Hydroxy-9, 10-Dimeth oxypterocarpan; (8) 8, 2- Dihydroxy-3, 4-Dimethoxyisoflavan; (9) Astragaloside IV; (10) Astragaloside III; (11) Astragalo side II; (12) Astragaloside I