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