preferred_name: isopenicillin N + 2 H2O => N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine + O2
preferred_name_lc: isopenicillin n + 2 h2o => n-[(5s)-5-amino-5-carboxypentanoyl]-l-cysteinyl-d-valine + o2
label: isopenicillin N + 2 H2O => N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine + O2
label_lc: isopenicillin n + 2 h2o => n-[(5s)-5-amino-5-carboxypentanoyl]-l-cysteinyl-d-valine + o2