preferred_name: acrolein + putrescine => N-(4-aminobutyl)-3-aminopropanal
preferred_name_lc: acrolein + putrescine => n-(4-aminobutyl)-3-aminopropanal
label: acrolein + putrescine => N-(4-aminobutyl)-3-aminopropanal
label_lc: acrolein + putrescine => n-(4-aminobutyl)-3-aminopropanal