preferred_name: a 3'-end uridylyl-adenosine-RNA <=> a 3'-end 2',3'-cyclophospho-uridine-RNA + adenosine
preferred_name_lc: a 3'-end uridylyl-adenosine-rna <=> a 3'-end 2',3'-cyclophospho-uridine-rna + adenosine
label: a 3'-end uridylyl-adenosine-RNA <=> a 3'-end 2',3'-cyclophospho-uridine-RNA + adenosine
label_lc: a 3'-end uridylyl-adenosine-rna <=> a 3'-end 2',3'-cyclophospho-uridine-rna + adenosine