preferred_name: cyclobutadithymidine in DNA = a thymidine dimer in DNA
preferred_name_lc: cyclobutadithymidine in dna = a thymidine dimer in dna
label: cyclobutadithymidine in DNA = a thymidine dimer in DNA
label_lc: cyclobutadithymidine in dna = a thymidine dimer in dna