2',4'-dihydroxychalcone <=> (2S)-7-hydroxyflavanone
2',4'-dihydroxychalcone <=> (2s)-7-hydroxyflavanone
2',4'-dihydroxychalcone <=> (2S)-7-hydroxyflavanone
2',4'-dihydroxychalcone <=> (2s)-7-hydroxyflavanone