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