a 3'-end 2',3'-cyclophospho-ribonucleotide-RNA + H2O <=> a 3'-end 2'-phospho-ribonucleotide-RNA + H(+)
a 3'-end 2',3'-cyclophospho-ribonucleotide-rna + h2o <=> a 3'-end 2'-phospho-ribonucleotide-rna + h(+)