preferred_name: meso-2,6-diaminopimelate => (2S,6S)-2,6-diaminopimelate
preferred_name_lc: meso-2,6-diaminopimelate => (2s,6s)-2,6-diaminopimelate
label: meso-2,6-diaminopimelate => (2S,6S)-2,6-diaminopimelate
label_lc: meso-2,6-diaminopimelate => (2s,6s)-2,6-diaminopimelate