preferred_name: a cytidine(6-4)thymidine in DNA <=> a cytidine-thymine dinucleotide in DNA
preferred_name_lc: a cytidine(6-4)thymidine in dna <=> a cytidine-thymine dinucleotide in dna
label: a cytidine(6-4)thymidine in DNA <=> a cytidine-thymine dinucleotide in DNA
label_lc: a cytidine(6-4)thymidine in dna <=> a cytidine-thymine dinucleotide in dna