preferred_name: a 3'-end uridylyl-2',3'-cyclophospho-uridine-RNA + a 5'-end dephospho-ribonucleoside-RNA => uridylyl-uridylyl-ribonucleotide-RNA
preferred_name_lc: a 3'-end uridylyl-2',3'-cyclophospho-uridine-rna + a 5'-end dephospho-ribonucleoside-rna => uridylyl-uridylyl-ribonucleotide-rna
label: a 3'-end uridylyl-2',3'-cyclophospho-uridine-RNA + a 5'-end dephospho-ribonucleoside-RNA => uridylyl-uridylyl-ribonucleotide-RNA
label_lc: a 3'-end uridylyl-2',3'-cyclophospho-uridine-rna + a 5'-end dephospho-ribonucleoside-rna => uridylyl-uridylyl-ribonucleotide-rna