preferred_name: (2S)-naringenin => 2',4,4',6'-tetrahydroxychalcone
preferred_name_lc: (2s)-naringenin => 2',4,4',6'-tetrahydroxychalcone
label: (2S)-naringenin => 2',4,4',6'-tetrahydroxychalcone
label_lc: (2s)-naringenin => 2',4,4',6'-tetrahydroxychalcone