preferred_name: an S-alkyl-L-cysteine = an alkyl thiol + 2-aminoprop-2-enoate
preferred_name_lc: an s-alkyl-l-cysteine = an alkyl thiol + 2-aminoprop-2-enoate
label: an S-alkyl-L-cysteine = an alkyl thiol + 2-aminoprop-2-enoate
label_lc: an s-alkyl-l-cysteine = an alkyl thiol + 2-aminoprop-2-enoate