preferred_name: (2S)-7-hydroxyflavanone => 2',4'-dihydroxychalcone
preferred_name_lc: (2s)-7-hydroxyflavanone => 2',4'-dihydroxychalcone
label: (2S)-7-hydroxyflavanone => 2',4'-dihydroxychalcone
label_lc: (2s)-7-hydroxyflavanone => 2',4'-dihydroxychalcone