2',4,4',6'-tetrahydroxychalcone => (2S)-naringenin
2',4,4',6'-tetrahydroxychalcone => (2s)-naringenin
2',4,4',6'-tetrahydroxychalcone => (2S)-naringenin
2',4,4',6'-tetrahydroxychalcone => (2s)-naringenin