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Representative chromatograms of saccharides in four kinds of Radix Rehmanniae (RR). (a,b): High-performance liquid chromatography with diode array detector DAD (HPLC-DAD) chromatograms (1. manninotriose, 2 mannose, 3 melibiose, 4 arabinose, 5 glucose, 6 galactose); (c) HPLC with refractive index detector (HPLC-RID) chromatograms (7. fructose, 8. sucrose, 9. raffinose, 10. stachyose). APRR: another processed RR; FRR: fresh RR; PRR: processed RR; RRR: raw RR.
