Singeonmi' is a new sweetpotato variety developed from the Mokpo Experiment Station, National Honam Agricultural Experiment Station (NHAES), Rural Development Administration (RDA) in 2001, which was resistant to fusarium wilt caused by Fusarium oxysporum

Sinjami' is a new sweetpotato variety with purple flesh developed from the Mokpo Experiment Station, National Honam Agricultural Experiment Station (NHAES), Rural Development Administration (RDA) in 2001. This variety was selected from the cross between '

Borami' is a new sweetpotato cultivar with light purple flesh developed at the Mokpo Experiment Station, The National Honam Agricultural Experiment Station, RDA. This cultivar was selected from the cross between 'Yamakawamurasaki' and 'Shinmi' in 1994, Se

The five phenolic compounds of peony root were isolated by Sephadex LH-20 column chromatography. Their chemical structures were identified by spectroscopic methods (UV, FT-IR, FAB-MS and 1H .&13C -NMR). The complete structures of these compounds were elucidated to be (+)-taxifolin-3-0-β -D-glucopyranoside, benzoic acid, gallic acid, (-)-epicatechin and (+)-catechin. The concentrations of five phenolic compounds in the peony root of three Korean cultivars (Youngchonjakyak, Euisungjakyak and Jomjakyak) were determined by reverse-phase HPLC. The constituents concentration in Youngchonjakyak were generally higher than in Euisungjakyak and Jomjakyak. The concentrations of (+)-taxifolin-3-O-β -D-glucopyranoside, benzoic acid, gallic acid, (-)-epicatechin and (+)-catechin in three different cultivars were ranged 0.23-0.52%, 0.20-0.30%, 0.26-0.28%, 0.09-0.12% and 0.34-0.63%, respectively.